The ideal thing would be to clone your key fob to a smart phone. Or a nice looking wrist band that acts as a FOB. Their are places online that can do FOB clones that I have been looking into.
A bit off topic... once I started the car, decided I wanted a different coat, changed and was a mile away before I realized I left the key FOB at home. I had to get to the UPS store to mail something so I kept going.
Lucky I remembered to turn off the auto shut off feature or I think I would be stalled at the first light. I got to the UPS store which was about 10 miles away, kept the car running while in the store and then drove home. Very stressful.
I would never forget my phone like that. I believe Teslas are use Smart phones instead of key FOBs.