I bought a complete front end rebuild kit from PST when I rebuild my front end. I believe I got all my brake stuff, including hoses, from rock auto.
As far as your caliper brackets go, the ones you currently have are for the smaller rotors.
These are the brackets you need, these are front Dr. Diff so you could either buy them on eBay or straight from Cass if you’re buying other stuff from him.
Mopar Caliper Brackets fit 11.75" rotors on '73 up DISC knuckles A/B/E body NEW | eBay