Yes, the 7/8" OD washer is available at Marco's - that is used to buffer coil recoil, but not the 3/4", which is used on one of the screws that hold up the underbracket of the front bracket assembly (i.e., it is there to keep a tight but slidable attachment for when the bracket obstructing the coin door gets moved, allowing the coin door to be opened). Every one of my '70s Bally pins (EM or SS) uses this, but the one for my Wizard! was so corroded that it broke in half upon disassembly.
I did find this, but I can only imagine that this thing would cost like $25 to ship , so I am looking for one in the USA.