Kevin, I never had a pin fall out before
If It's long enough then I would just lay it on a solid piece of steel like a vice or anvil so that the pin is touching something solid on the back side. Git a good nail set that will fit over the pin and hit it lightly with a hammer.It wont take much to flatten the pin a little so it wont fall out. Then do the other side the same way.Don't do it to hard or you'll crush the lever and that's not good. Just go easy.
If you need a bigger pin then I would buy one from a Remington parts site. It has to be case hardened to stand the loading abuse we give them
Thanks for the compliment guy's but Im just trying to pass on what I have learned from others over the years. Lot's of little tricks to getting these guns running like a fine tuned clock but it can be done and to me it's fun...Not work. My wife say's when Im messing with my guns or Longbows my eyes light up,Lol. Mike