Cyclone Power Technologies, Inc. (fka CYPW)

[greenpar]

You might look into exotic teflon I replaced metal bearings for comercial fishing boat winches that rusted out with this and worked great with hundreds pounds of force on them. Now they make them for car bushings.
Teflon® or Kel F® sealed for caustic or highly corrosive applications. http://www.snap-tite.com/snaptite_QD/products/chemical_couplings/

POLYLUBE® Composite Bearings
Composite bushings - light, strong Permanent lubrication - beats metal http://www.polygoncomposites.com/division/products/bushings/products?ctt_id=4124120&ctt_adnw=Google&ctt_kw=teflon%20bushing&ctt_ch=ps&ctt_entity=tc&ctt_adid=5657050576&ctt_nwtype=content&ctt_cli=8x12237x108709x896636&gclid=CJb5xeyGgqMCFRkBiQodGmw4dg