Are you still wanting one? I have one in my basement attached to a seat, on the bottom of a pile of seats.
I disassembled, greased and painted everything some years ago so that it would give good service, but then found out it was kinda tall for my 68 bench seat (even on the lowest setting). I never used it and swapped seats shortly after. I believe it was from my Dad's stash from a 72 Newport.
If interested, send me a PM of a price range you have in mind. I'll have some effort in unearthing it for pics and checking it out, so I don't want to give it away, hope you understand.