My pleasure .. Did you snag them ?? I know one of the places like Year One used to have them too, I think that's where I got some last year .. Let me know if these didn't work out and I'll dig some more..
Good luck,
Kenny ..
ps .. if you haven't taken the old ones out yet, be careful if you don't have a puller.. I used air pressure the first time and darn near took my kids head off.. That sucker was bouncing all around the shop !! :-D
Go to the MOPARTS website and page Jim Lusk. He has all the info. on parts # and parts stores that offer the pistons for the K-H calipers.
Also, the pistons from the early (1964.5 - 1966) Mustangs use the exact same K-H calipers as the 1965-72 A- bodies. The pistons are readily available from numerous Mustang parts suppliers.