Welcome Mitch. I'm not sure you'll have a lot of luck finding many breeders on the prairies. I think people are realizing the effects of BSL. There are still a ton of towns across the prairies with BSL, but most of them have become very lax. That said, this forum is very rescue oriented and there may be some options for you there.
Prairie Pitbull Rescue based in Medicine Hat, AB. http://prairiepitbullrescue.com/
Adopt A Paw in Saskatoon always has a good selection of pits available. http://www.adoptapawpethaven.com
Prairie Pooches Rescue in Cando, SK usually seems to always have a couple pits available. http://prairiepoochesrescue.com/
Bright Eyes (Regina), Prairie Sky (Regina), and New Hope (Saskatoon) are the other large rescues but they don't seem to have pits too often.