I forum user a long time ago had for sale stainless joystick dust washers. He was selling them for $5 I believe and they looked really sweet. Maybe someone has the means to create some washers? I imagine you could make a little extra cash for your trouble!
Franco B was the guy I think. The washers were 1.5" polished stainless disks and he cut a couple circular grooves in the top for aesthetics.