Experiencing electrical failure

[Shinto]

Last night I was on my way home and the "Service ABS" light came on followed a minute later by another about the SRS, then the SES light a few seconds later. I raced into the nearest parking lot and shut down. It wouldn't restart. I had to have my wife come out with the jumper cables and jump start it. It ran fine for about 2 miles and everything started happening again, this time I lost my headlights and dash lights and the engine began cutting out before shutting it down and jumping it again for a good 20 minutes. I started the car and ran as fast as I could and got it about a block from home before everything went dead shortly before the engine died and I had to bring to the side of the road dead stick. (Ironically I went right past a Sheriff's deputy at 45 mph in a 25 with no lights on to save power and he didn't seem to care...)

Strangely, the battery light never came on.

I highly suspect the alternator is dead and the engine was running off the battery until it ran out of juice. Anyone else experience this? Any other alternatives? Somehow, I'm not convinced its the ECM.

Also, I saw either here or another forum some time ago where someone came up with a method of swapping in a much cheaper L-98 or LT-1 alternator. Can someone point me in the right direction here?