Depending on where you are you might think more about going to Calgary or Edmonton. Lot's of choices there. I've seen the work of some of the chassis shops and they are pretty good. You could also get a hold of some people who do it on the side. I've seen some really good work by Jim Durovick (spelling?) in Edmonton. He is a Super Comp racer and has done our Blown Alcohol Altered Chassis. He also did my Triumph. I've seen a bunch of his work and it's all really clean, simple and STRAIGHT. I've found he is always priced good and I have had others tell me the same.
I'm sure if you look hard enough someone in Saskatoon must be doing chassis' too. Get a hold of someone from the track. They should be able to point you in the right direction. Better yet get ahold of Don MacGowan from Quick Times Magazine. He'll know who and where.