ok so I have had a few people pm me asking if I can make one for them in various shapes. I am perfectly willing to do this for my cost- no profit, but it would require you to send me a key card programmed to your vehicle for me to put inside the key chain, or possibly a blank that you can then have programmed (I make no guarantees it will be able to be programmed after the fact though). Cost of materials is about $10-12 (include share of the paper clay, the acetone cost- it takes ~400 mL to cover the card, plus the key ring) depending on how many colors are used and the size of the object. I used about 1 tub for my wolf, the problem is you have to get all the colors so I have no grey left. I can use any of the other colors though, I figure it at ~50 cents a tub. I can probably put it in a baggie and mail it regular mail for the cost of a stamp so no worries on that.
Again, if you REALLY don't want to do it yourself I am willing to make one for you (we will need to talk about the shape to make sure my limited art skills can handle it- LOL). However, I put up my instructions posts b/c it is realistically something that you can do for yourself in very little time and expense. It also requires a LOT less trust than sending a stranger on the internet your address and a key to your shiny new Model 3.
Summary below:
What you need:
1. air dry clay that you know is able to be rolled VERY thin- about 1-2 mm is all the thickness it can have for each side. I used this kind:
https://tinyurl.com/ya8mpgrn
2. Acetone (not nail-polish, you need the REAL stuff from the hardware store)
3. Some type of tool to shape and decorate if desired- you can do the shaping by hand or use whatever you have around the house- knife, toothpicks, paint brushes, etc)
4. a GLASS jar (the acetone will melt a plastic jar
5. small binder clip & pencil/toothpick/tweezers/etc or other contraption to hold the chip part out of the liquid
6. Creativity! (a pic of your desired shape helps for reference)
What you do:
1. fill a GLASS jar with the acetone, up the a point where it covers the card
2. put the binder clip on the chip part of the card (top right corner) and slide something through the ring ends.
3. Dip the card into the acetone and set it so the tweezers are across the top, keeping the chip part out of the acetone. *it helps to put the jar where it will not be disturbed and tilt it on edge so the acetone cover as much plastic as possible without covering the chip.
4. Let it sit for several hours until the plastic falls away easily. You may need to peel it back.
5. Rinse the acetone from the chip & antenna.
6. Check your chip/antenna to make sure it still works.
7. Roll out your medium to 2 mm thick or less. You will need a front and a back.
8. Cut out your shape (make back slightly larger the front to smooth together the edges)
9. Place your chip/antenna down on one piece of your shape. Gently press to hold it in place.
10. Make a hole somewhere for your key ring, be careful not to nick the copper. You can also just add some sort of string or twin at this point instead of making a hole and using a key ring, but I don't guarantee that this will hold up.

11. Place the other piece on top of the copper to sandwhitch it b/w the 2 pieces.
12. Create any texture/decorations on the outside.
13. Smooth together the edges to seal it up. Check it on your car to be sure it still works.
14. Allow to COMPLETELY air dry.
15. Place a few drops of white glue on one side and spread it around to make a thin layer covering the entire piece. This will seal it from weather and keep the plastic around the chip from poking through. Allow to dry.
16. Repeat step 15 on the other side.
17. Use scissors or a knife to separate the 2 parts of the key ring. you want the clay shape to slide easily through the gap so it doesn't tear. You may need a third hand for this step.
Done!
PLEASE consider doing this yourself- it was not my intention to make this a business, just to help others.

Have fun!