Pirate Jacks disc brake conversion kits
im running scarebirds on my 71
all off the shelf consumables (discs, pad, and even calipers) as long as you dont that some of it came from a chevy citation, some from a toyota of sorts and i believe the hoses were even off a cadillac or something
back when i bought it, the "whole package" was about 500 but you can probably knock an easy 200 of it scrounging the parts yourself