Relative to Pony Express's comments, I know that at least Colt re-issued a "Trapper" model of the 1862 Pocket - no rammer, short barrel. Not the most attractive thing in the world to my eye, but I'd sure take one! Another thought - cut the barrel where you want it, and carry the uncut rammer, with screw (figure out a way to keep them connected, and use it when loading. If you're reloading, you've got to be carrying some sort of container with more balls, caps and a powder source anyway...
Jamie