I just looked at the rowbyrowexperience site and there is only one shop in Quebec participating. (the Ontario page actually has the Quebec shop listed at the end of the pages)
https://quiltetcoton.com/ Maybe if you contact them they would have a better idea if there are more shops you could visit. (it is in Gatineau) I know there were shops in the Maritimes because I did visit some in 2007.
I can't see much info on this shop but it's reviews were good.
http://www.effiloche.com/Bienvenue.html