I have a 1950 Marlin 336A with the 24" long pre-microgroove barrel. It was not originally drilled and taped for a scope mount, but it is now. I want to mount a scope but I need a hammer extension. The hammer is a little bitty thing. It looks like the hammer on my 1893 Marlin. Late model hammer extensions by Uncle Mike will not fit. What did people do with Marlin rifles that had scopes mounted in the early 1950's? Is there a product out there that will work?