Hello,
The easiest thing is ask other Volvo owners that you see driving around. The reason why I say this is because word of mouth is the best advice. The other thing you can do is check the yellow pages for specialty shops in your area. There are lots of Volvo forums out there. You can try volvocars.com.v70r.com,swedspeed.com,volvoforums.com, turbobricks.com
All of these sites should be able to steer you in the right direction.
If I find any more I will let you know.
Thanks Ryan K
I just checked swedspeed.com go to there links page and they have a lot of links to various sites for Volvo's.
Volvo Master Technician
15 years working on Volvo,Saab,and VW. ASE Master,Volvo Master.Freon recovery certified.