Question about clutch Z-bar mounting stud

[saxart]

Quick question...

Does anybody know of a cheap replacement for the rubber "O-ring" that is on the engine side z-bar mounting stud for the clutch bell-crank? (V-8 and SM465 manual transmission) Mine is disassembled right now, and once I cleaned it up everything looks to be in great shape, but the rubber piece that goes in the groove on the engine side ball-stud disintegrated when I first pulled it apart.

For those who know what I'm talking about, I'm calling it an O-ring, but it's more of a flat ring of rubber. You can see a pic of it in this thread:

http://67-72chevytrucks.com/vboard/s...d.php?t=709642

Any thoughts are appreciated.