Mine has all it's work done by me. Do you need a simple recharge? Vacuum and recharge? Full replacement? I could probably help you on a quick vacuum/recharge. I have all the tools necessary. Mine blows down to 42F! Even running at the lowest speed, I have to turn vents away from me. Replacing the valve cores, vacuum, and recharge are my recommendations based on age. Especially if it still works.
Mine went to Hill Country European Autoworks for electrical work.
https://www.hceuro.com/
Basically, I wanted confirmation I had found my amp draws. They did great work. They spent 6 hours on it. Charged me only 3 hours since most of it was waiting time. The shop is clean. I would take mine back for work I couldn't do myself. The shop recommended fixes. The fixes recommended worked. A GMIII replacement fixed all the electrical amp draws and non working body control functions.