Where to get bolts for KH disc brakes?

http://www.slantsix.org/forum/viewtopic.php?t=43435&sid=fe98e4eedf5c285540cc27e6c1fd6348
you might have to find a shoulder bolt thats close and shim it, try Mcmaster Carr, or poke around the ford forums they used them in the late 60's mustwangs