Here's a link where you can purchase washers from, also 1/16 brass bar is pretty easy to get hold of, put a search on ebay for 1/16 brass bar I'm sure something will come back.
FWB0 100 #0 .064 1/8 .017 $ 4.20
FWBW0 100 #0 wide .064 3/16 .017 $ 4.90
http://www.microfasteners.com/catalog/pr...WASFWB.cfm
Jamie