cujo8,
IMHO, what makes this washer "special" is its size..nothing else. I am sure you have come to this same conclusion. I looked in my "special" book for this washer. The ID is standard for a 1/2" bolt, but the OD and thickness are much greater than even a extra-thick washer lists.
Short of a friend with a lathe, you're going to have to search. A machine shop could whip one of these babies out in nano-seconds. It might be more than $1.98, but as my dear old MOM used to say, a bird in hand is worth two in the bush!
Stuart
