Ernest,
First, I hope someone from Jaguar USA see's this note and comments. That is a dealer that would never get any of my business, and I would insure that all my email contacts in that area get's the message. What a sad situation for Jaguar owner's. No service for 10 year old or older car's-- indeed! If that was the situation here in Florida, he would be run out of town on a rail. ;-)
Now to your mirrow. Stop by any auto glass shop and they will put the mirror and possibly the rear stop light back on for you in more like ten minutes. If it requirs some sort of glue, these are the guys that have what's needed.
Cheers
Garfield 05 XJ8L and XK8 Conv.