The generic HF 4 tonner works ok for the price, although I wouldn't recommend it if something better was available. My HF broke the spreader attachment, I had to rebuild the ram, and now the hydraulic fitting at the ram broke (dropped it while removing the ram from a bent car).
The spreader was on the HF shelf as a stand alone part, so I imagine failure rate is high so they stock them separately.
Somewhere along the line I had the foresight to buy a ram rebuild kit, although I don't think I've ever seen another one.
The fitting is some sort of weak high sulfur free machining steel with very thin wall thickness at the thread roots, designed to fail. I assume a hose supply store will be able to come up with a replacement. I robbed the fitting off of the spreader to keep going, and my normal sources (Farm & Fleet, TSC, Ace, Menards, auto parts stores, etc.) haven't been of help.
It works, but I really get irritated when fixing the tools becomes the project.