Hello - I am new to the forum and was guided this direction as a possible place to find some obsolete parts? I am wondering if anyone has or knows where a person can buy the seal and o-rings that fit the "cab lock" cylinders on a 76 Mack Cruiseliner? Just to clarify, these are the short, locking cylinders on the rear of the cab, not the cab tilt cylinders that push the cab over? My local Mack dealer is steering me toward purchasing a complete new cylinder that he says originally fit an early 80s COE model. I am a novice mechanic at best, so I apologize in advance if some of my terminology is not totally correct. I'm just a guy that loves tinkering with these old trucks and especially COEs! Thanks in advance for any advice/information I can get on tracking down these parts.