finding an aftermarket alternator

I have a '97 4Runner. Im currently running an amp at 2 ohm, putting out "900" watts. When I do some calculations, I find that my amp would be using about 75 amps to produce a true 900 watts. I have an 75 amp alternator... I already plan on upgrading the "Big 3" with 2 or 0 gauge, and running a new 0 gauge cable to the cap, then on to the amp. All I need now is to find a high output alternator. I figure many people here have replaced their stock alternator with a H/O ones and could recommend a brand of a good H/O alternator and where to get it. I would appreciate any advice on this issue. (still a newb in this area)

Try this: ALTERNATORPrepare your future. It wasn't the lack of stones that killed the stone age.