The ranger stuff is all one off. Since they are so rare i doubt you will find parts for them.
The ranger has its own harmonic balancer different from any of the mitsubishi ones, as well as the alternator/ac were mounted in opposite positions. The ford vac pump was mounted where the mistu mounts the power steering pump, top passenger side of the head.

Your best bet at this point is to go with a VW electric pump or put a mechanical back on. When mine failed, i ordered a new alt with pump on ebay for $120, its a 90a with new vac pump