What donor vehicle to get disc brakes setup from for 72 swinger.

I once saw on this forum that you could use parts from a much newer vehicle to convert a 72 dart with drums to disc brakes. Would anyone know anything about this? I know I could just spend like $1500 for new parts but honestly the money is just not here at the moment. I have a lot to fix on the car and 1500 on brakes at the moment is just not at the front of the line.