Thanks for the help. The ones from Phil Kiner are just what I was looking for. Less than $11 including shipping is cheap enough. Looked at the hardware store the other day and the 1/16" nylon ones were 50 cents each.
Just ordered four sets. Look like a good value and something any trapshooter can use. I've been scrounging washers from buddy's for many years. Now I'm gonna give some back! Have to admit I'm a Kiner fan also.