Look on the FBBO,FCBO,and FEBO sites for these anything from an 8 3/4 or Dana will interchange. I got mine from a 68 Chrysler 300. Also the truck site as well.
Thanks! The last set of these brakes I purchased came from a ‘68 300 as well! Good idea about trying the other MOPAR sites. Since I’m already member here I figured this would be a good place to start.