Terry , Gary,
inn regards to sourcing Polyethylene washers I
recommend Penn Fibre
http://www.pennfibre-dot-com/
from fish paper to fluoroplastics and G-10(Yup!) to Polyethylene you name
it, in thicknesses,of .01" to .125............
for "off the shelf" in nylon try http://www.microplastics-dot-com/ or
http://www.ryanherco-dot-com/ for pultrusion fibreglass&PVC
Robert Cressler