I stopped by 4WPW today, and picked up a Powermaster 140 amp alternator. I brought it home, and it looks like a good fit, but I won't get it in until tomorrow. Its a 1-wire design, so hook up should be easy. It has a little tag on it that says that its output has been tested at idle as 94 amps, and at highway speed as 141 amps. It cost $140. Part number 47294.