Aftermarket brakes for a 70 Dart?

^^
S'cuder nailed it. all of the consumables are readily available and easily obtainable at local parts places.

spindles are available new, factory style UCA's are currently difficult to get a hold of (this seems to go in waves as they make production runs), but tubular uppers are easy to get. dr. diff has all the other stuff.

the yards are drying up, but there's still stuff out there (i scored all that stuff about a month ago). but swapmeets, ebay and the classifieds here turn up most of the hard parts on the regular (spindles, uppers, lowers, caliper brackets).