Couple Places
Well, as everyone here will tell you, Call Rudy, of D&R, listed in the Links section. He used to work for O'Day, and knows everything you'll need to do. Also, there's a place in Canada, Stainless Outfitters, I spoke to them about Stern Rails for my 22, and their price was about the same as Rudy's. You can find them by web searching their name. Good Luck!!