If that doesn't work for ya, Knarley Bob, I got one of the Magnum shields from Past and it works great! I call it my Wussy Pad, (well - words to that effect
) but it's really convenient. It fits under my clothes. I put on my undershirt, then the pad - then everything else.
I got mine for prone shooting. I have NO issues with my 45-70 offhand, sitting, or kneeling and prone doesn't hurt, either ... until about the 5th shot. THEN it starts to get uncomfortable. When my pard GW let me shoot his (memory in question, here) 45-100, I shot it prone and it really put a crimp on my shoulder - but that was BEFORE I got the pad. I got mine from Midway for $30-$35 if I remember right. Maybe $40.
I'm not normally recoil sensitive, but I found that I sure am on the top side of my shoulder ... well, not exactly the top, but up there on the top quarter. You know what I mean, I'm sure.