I bought an old Craftsman miter box saw a few months ago, and have managed to clean it up/set it up so it works pretty well. But there is a movable clamp (it can be moved either to the left or the right of the saw itself) that holds down the piece being sawn. The part that actually touches the piece of wood being sawn is a donut cylinder about 1.5-2.5" diameter and about 3/8 to 1/2" thick. There isa hole in the middle, which attached to the movable clamparm by means of a bolt and a wingnut. The outside of the cylinder pushes down against the work piece (it actually holds it quite nicely). However, because the cylinder is made out of a yellowish, resin-like hard rubber/plastic, and this saw has been around for many moons, the cylinder has disintegrated into a few useless chunks. I've looked on the web for a picture to show, but haven't found this particular variety of hold-down clamp on a Craftsman miter box, so I hope my description makes sense. Anyway, would anyone have a clue where I might look for a replacement part or -- more likely -- for some suggestion as to how to improvise something? Or are there "resin donut" supply sites out there somewhere?