Delica Canada | Mitsubishi Van Club

If you can't get OEM parts locally or are too expensive, this document lists part descriptions as well as part numbers for Mitsubishi alternators. You can save a whole whack of cash replacing individual parts like brushes, bearings and seals, regulators and rectifiers, with generic ones rather than buying a new or rebuilt alternator. I was able to find a description of the O-ring seal between the vacuum pump and alternator, making replacement very easy.

http://www.scribd.com/doc/60074137/Cargo-2

I had my last one completely rebuilt for $65 or $70 locally. Made the jump from 75 amp to 110.
But it is good to know you can get individual seals and such.
Fs