There are a couple of guys around; here are somes places that I've gone to before:
Werners Auto Service (Cambridge) 519-621-7711
Cambridge VW 519-621-8989
H2Sport (Georgetown) 905-702-8299
http://www.h2sport.com
Strictly European (Toronto) 416-636-7575
http://www.strictlyeuropeanmotors.com