I bought a 1955 era Marlin 336 in 35 Rem. I love the old gun. Fitted it out with a nice 2 X 7 Scope, Hammer Spur [New uncle mike's] & sling swivels. It looks/shoots great. Problem is the Hammer from that era was machined to a nice taper. The modern Extensions are cut Square to fit from 1957 to the late 1980's hammers. What can I do to make or fit a hammer spur that will stay on that old type hammer ? Mike in Ct