The "Start Shop" in Albuquerque was able to replace the internal voltage regulator on my 24V alternator last year. The parts are out there somewhere (I wish I knew where...). They cleaned up the alternator with a wire wheel (ruined some rubber parts) and sprayed it to look 'purdy'. I just wanted a VR, but oh well. Give them a call and see what they can do for you. I am totally unaffiliated, so hopefully it works out well if you call them. (505) 255-1883. I don't have any solutions for an actual replacement.
