Do you need 1 or 2?
I have a couple that the center holes are distorted a little, they have rust pitts. But very usable with a little handi work and a ball pein hammer.
That is my listing on ebay. I can not remove the extra from ad because of the pictures show them with ad.
I can take a picture later if your interested?
Marty in Buffalo
Livin in "CheektaVegas, NY
Still have a Kaw! 76 KZ900 Pro-Street.
Went thru 25 of these in 40 yrs.
And The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
There are also two metal (steel?) disks that fit into the back of the caliper body. The nuts for the slide bolts tighten against these. They aren't shown in the diagram, but maybe that's what's missing?
'78 Z1-R in blue, '78 Z1-R in black, '78 Z1-R in pieces
'95 GPZ1100 (sold) , '00 ZRX1100