Several guys on Yotatech seem to have had good luck with this company:
Boyle Future Technology
12325 Locksley Lane, Auburn, CA 95602
phone: (530) 888-6290
Here is a link to one of the threads suggesting them:
Question about high output Alternators. - YotaTech Forums
I haven't pursued this avenue yet but might for my OEM 22RE alternator. Might also be a good option for an 80.