Hello; Not a highjack, but I have been looking for a muffler for my old OS90 four stroke, for abour three years. I know two other fellows that want to find a muffler for their old FS 120 OS engines. If the strap is all that's missing, I would likely make one out of the cutter on the roll of aluminum wrap, or some such scrap plated metal strap that would usually get thrown out.