I'm new to the channel and understand you want Amperage supplied by the alternator for all your accessories. However, I just wanted to repeat what you probably already know.
Keeping it simple the Alt charges the battery. All accessories work off the battery and the alt. just keeps the battery charged. So it would be hard to work so many accessories for so long as to drain the battery faster than the Alt could recharge it.
Firebird Central sells stock replacement Alts at 63 Amps.
The only reason people want more amps is because of the new Amplifiers for the radio's, there always on and will make the stock Alt. struggle to keep the battery charged.