How about this one:
https://www.dbelectrical.com/products/alternator-mercedes-benz-300-series-gas-1993-c-e-class-1994-2000.html

And the INA clutched pulley:
OEM INA Alternator Pulley Made in Germany 022903119C | eBay

I don't really need to up the amperage much, I just want a more modern design that is more efficient and less failure prone. What kind of wiring mods would I have to make for a 90 amp upgrade?

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Garage:

2017 Chevy Colorado Diesel (nanny state emissions)
2005 Volvo S40 T5 AWD, 77k
1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg
1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg

WARNING: this post may contain dangerous free thinking.