Here is one I bought that supposedly fits my 53 3100. I don't remember where I bought it. I'm going a different direction so I don't know if it fits. I'm a big fan of hydraulic throwout bearings. Get the ones with the bleeder hose on the outside or buy one. You don't want to bleed it anywhere near your clutch. If there is no air I don't see how it can drain down but I'm no expert. Maybe a residual valve like on brakes?
