fusion

I would ask if he wanted to chrome delete since the car is already in there and cut him a deal.  Might be faster because getting replacement parts from Tesla is a huge pain because their parts are usually back-ordered.  Of course you have to offer the service in the first place.

Easier to get I would assume. 

There are actually a few vids showing the back window.  Does not look too hard. Just take your time and do it!
Here's two of the best vids showing shrinking and also a install.