The old 49-ways made by Midway used a different diameter shaft than the newer Happ-produced ones, and so the grommets and actuators have the wrong sized holes for Randy's handles. Gauntlet Legends is a fairly new game, though- I wonder if it has the old sticks, or the new ones? You should measure the diameter of your handles, or the hole in your grommet if you don't have calipers.
If you do have the old ones, Randy might be able to sell you a handle and grommet- then all you need is the correct actuator, which you can either order, or try to find a substitute at the hardware store.