I'm going to use a Shimano 600 group on this bike, and the front derailleur has a built-in cable stop, so I have a clamp-on cable stop/guide for the down tube, which means the rear derailleur cable has to run on top of the chainstay. I have another clamp-on cable stop to replace the braze-on that I want to remove.

Is the oxy-propane readily available at hardware/building supply stores?