MD Charlton & Company on Van. Island should be able to help you out. Murrey Charlton has done a lot of work on PPC guns. Any decent pistolsmith should be able to install one. The 3 most popular sight ribs used in PPC are; The Witchita Grandmaster, Aristocrat, and the Bomar. The first two mentioned are probably the most popular. Brownells has them in their catalog, not sure if they can ship them to Canada though. Charlton or Questar Int. should be able to get one for you. Instead of installing a rib on your on your stock L Frame, consider finding a used Custom Built PPC gun. There are some around for 500.00 - 800.00 including belt, holster etc. Once you consider the cost of your L-Frame, a sight rib at 250.00 plus and gunsmith charges to install it, you might be over the cost of a Custom. Also you can use your stock L-Frame for the Distigushed Revolver event in CPCA PPC matches.