i've run into this a few times before: i get my hands on some great vintage pedals worth $30-$50, i start to overhaul them, and later realize i can't adjust their lock nuts due to a stripped tooth on the keyed washer.
is there a source for cheap keyed washers besides another set of expensive pedals?
the latest find was a beautiful pair of campy record knockoffs, kkt pro ace pedals. they're awesome. but neither washer has any tooth left. here's a pic of the washer:
13mm outside diameter
7mm inside diameter
1mm long (missing) key/tooth
2mm washer depth
i'll keep looking in the 'used' bin at my lbs, but i do wish i had about twenty of these keyed washers in slightly different sizes.