Ok, looks like I can get a Lexus SC400 100 amp alternator, used, locally here for $80.

Then I will have *potentially* a 100 amp output (maybe maybe not for it is used), I will have to fit it which means time on new brackets, and possible wiring issues.

Or I can have my stock alternator rebuilt at a shop for $160 and they claim its output will be 120 amps, and they will load test it on an amp machine before I pick it up to ensure my satisfaction.

Recently, what I've learned is that my time has become faaaaaar more valuable than I once considered it, and to be able to  just upgrade my stock part -- which they can do in 2-3 hours -- yields more time to focus and work on other more important jobs that I need to do to my truck.

So looks like it will be a modified stock alternator at 120 amps for me

Thanks for all the feedback
BigMike