I am also looking for Wrangler mechanics in Montreal. I did find this and stop in for a chat yesterday. Accueil
The website has only contact info, but the guys where friendly (I speak v little french). They mainly focus on modifications for off-roading though. I need some rocker rust taken care of and they said they was a bodyshop on the corner that could do it. I am going back next week to get a quote. Hope this helps, but I to will be keeping an eye on this post.