Grrr, keep getting outbid. I am now looking at
this auction... But I'm not sure of the properties of UHMW plastic... Is it very machineable? HURRY, before time runs out !!!
EDIT: Found this:
UHMW
Meets FDA guidelines for pharmaceutical processing and food contact application
Profile: Superior abrasion resistant, low friction surface, excellent wear resistance, good impact strength, corrosion resistance, no water absorption, good machinability
Applications: wear strips, chute linings, guide rails, work surfaces, bearing surfaces, sliding surfaces.
Looks good nuff for me
EDIT 2: Won

Looks like I will have plenty of material to make many revisions
A single bar of this stuff at mcmaster (.75"x3"x60") is $51.60. I got 3 pieces, each .75"x4"x22" for 25 bucks shipped
Looks like I snagged a good deal.