OP is happy to have the repair cost high cause he can get a new Tesla much faster than his old one repaired, which he might never trust as much. Probably dented the battery or side frame rail.
To answer OP questions:
1) check Tesla.com for similar used. and https://ev-cpo.com/hunter/
2) cherry pick from two, promised a fast settlement for the right price so they don't have to rent longer
3) since you are not at fault use you insurance co to put pressure on other
4) ask your insurance company about the maximum rental and get it, see if you can find a Tesla
I agree totally with this post. Farmers has always been great and very fair. Before I got my Tesla, my former car was totaled and I was amazed at how much they offered me on the settlement. But things change with insurance companies. For example, I had to change from Farmers when I got my Tesla 2 years ago as their rates for insuring Teslas was way out of sight. My agent was as upset as I was because I had been with them for over 40 years. He said that someday they would see the error of their ways, and apparently they have since they now insure Teslas. But I do know that Farmers will go the extra mile and battle the responsible insurance company. So very sorry for you and hope it all works out.