Blocks of hard maple will last about 3 days past forever. Turn them round on a wood lathe if necessary for clearance. Use rubber washers made from a big truck tire sidewall if you want a little cushioning.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!