I think those were the same drive washers as on another brand of engine or two. Might have been O&R, or maybe the green head Torpedoes. MECOA bought all of the remaining parts stock from Fox and you might check their website if you haven't already. I wish I had a junk barrel like the late Marvin Denny had!! he was consistently pulling parts out of there to help guys out with small parts. i wonder what became of that after he passed away? We miss you Marvin "Big Iron" Denny!!
    Type at you later,
    Dan McEntee