Paul,
I found a place called SCI Laboratory Specialties (
http://www.scicominc.com/teflon_sheet_stock.htm) that has 3/8" x 12 x 24
teflon sheet for $134.  Not a great price, but beats McMaster-Carr's price
by $40.  Maybe I can sell two strips of it to some others on the list for
their slide throttles.  Everything else needed I can buy locally.

Mark