Older tilt assist. Can't find parts

[fireman57]

The trim assist on my '80 50hp evinrude has gone to find Nemo. Pretty much shot. Can't find one anywhere either. Do any of you guru's know where parts are available for me to rebuild this one or have one lying around that needs to find a new home? It is the unit that looks like a giant gun when the ram is extended. It pushes up on a plate to raise the engine. Doesn't work for trim when running. I know you older sage's remember this unit. Any help would be wonderfully appreciated.