Rock Auto will be your best bet,
https://www.rockauto.com/en/catalog/pontiac,1970,bonneville,6.6l+400cid+v8,1246014,brake+&+wheel+hub,rotor,1896
5006R
John
Montreal
26 1969 American Pontiacs
and a 1969 Canadian 2+2 Hardtop
That would explain his reachout here. Must not be many still left out there.