A few years ago, I saw a neat deal in a magazine. Each press was bolted to a piece of sturdy plywood. The plywood could then be slid into a wooden receptacle, sort of a dovetail setup. The plywood could then be tightened in with wingnuts.
I made up several crude ones, and that's what I've used since. Now that I have an actual "gun room", I plan to re-do the whole works with some nice wood, and make a better job of fit and finish. This set-up works great, as you can have more than one receptacle, plus you can also make them removeable from your table/bench.
If someone has some pics of this type of set-up, please post. My stuff is still all "stored away".