Jim, a couple of Indy's just in case you need them:
European Service on First Avenue, just north of Grant Road, Keith Brooks
Motorwerks on Stone Avenue, just north of Prince Road, Bart
Craig's on Grant Road, his wife drives a 300TD
There's another one on Ft. Lowell Road between Stone and First Avenues, I believe it is "European Auto Tech" or something similar. Never had any dealings with them so I can't vouch for them. I believe Desert Panther has dealt with them so he could give give you some information.
Welcome back to the desert!
Oh yeah, regarding the "sagging rear end", it's pretty common with age, have you considered Pilates or perhaps this:
http://www.ebay.com/itm/Exercise-Butt-Master-Suzanne-Somers-Fitness-Equipment-Complete-/291152096001