i'm not sure what these are called exactly, but i'm trying to find a hydraulic cylinder similar to the type on many of the over-the-counter log splitters, such as the ones sold by home depot. rather than being pinned at each end, they have a mounting flange at one end only. i'm looking for one that is 5" -6" diameter, and probably 8" stroke. does anyone know of a supplier of this style cylinder?