I don't know of any Porsche shops near Surrey.
I'd recommend:
Weissach
MB Euromotors
SCAN
They're all very active supporters of the local PCA, and MB Euromotors runs a Grand-Am race team, Bullet Racing.
Full disclosure, I'm the Team Manager for the race team
http://www.bulletracing.ca, and am on the Exec of the local PCA.
You can also check out our local forums for more information:
http://forum.pca-cwr.org
...jeff