FYI, Recently I was trying to repair leaking caliper on my 79 FJ40, the leak was from the small flat O ring between two sides of caliper, called all major parts suppliers, no one had them. Tried normal new spherical O rings, they didn’t seal. Thought my only solution was new caliper. Didn’t give up, tried Rockauto, they had 3 brands of rebuild kits, ordered 1 of all 3 brands for $6-7 each, and HALLELUJAH, the Centrum brand had the 2 flat orings! Replaced and no leaks!
Hondo
Hondo