Take your existing alternator to any competent alternator shop and ask them to rebuild it. A nice cleaning, some tightly wound copper wrap and new brushes, diodes, etc. will bring it up to about 40 to 42 Amp. The difference from OEM is that the materials are slightly higher grade than ...
Ron, very nice explanation I wish some of my EET instructors would have had the ability to word their explanations in a manner as understandable as what you provided.