Offroad-Express

does anyone know where i can get vacuum pump parts for an 4jb1t altenator getting brushes etc is easy but vac pump parts seem hard to find any suggestions

What parts are you after exactly?

not sure yet as i havent stripped down the old one yet but it wasent working very well

Most auto sparkies have a pile of dead isuzu alternators. If you ask nicely they might dig out a vac pump for you.
But normally they don't crap out they wear the drive splines off the rotor and stop turning.