I'm living in the province of quebec in canada,I think that I'm not the only one...where to buy a 2.5 pulley for a 1994 ssei.....near Montreal???

Nowhere 'near'. Nobody sells them locally to anyone. You have to order them on the internet.

First read this:
http://www.bonnevilleclub.com/forum/...=article&k=104

Then when you're ready, order your pulley from www.pulleyboys.com

http://www.pulleyboys.com/gms1p.html

Please note that they are under new ownership. I'm not sure if anyone has ordered since the change, but the site looks to be in order. You'll also need a 3.5" idler pulley for your SC tensioner assembly to replace the 3" stock idler.

yeah no one here sell stuff for the 3800 franois .to get my aeroforce scan gauge i went tru a lot a waiting and very expensive once its get here .but im part of a 3800 club here in quebec where they know how to order these parts .pm me if you whant to know