Dukes, I realize you did not ask for advise or opinions. You just want a regulator. So this is for anyone who may be interested, including you.
1. I do not know what your charging symptoms are. Don't know if you have determined the problem is the regulator for sure.
2. There are several reasons for charging issues.
3. I never bother with playing with an alternator. They are relatively cheap and you get additional warranty with a rebuilt. After I check all other possibles.
4. I use a AC Delco 10si. Cheap. Parts plentiful.
5. I will continue to try and find the regulator you need. The one you mentioned is a dead ringer for a 10si and says "Delco Remy" on it. I would bet that the regulator is the same as a 10si. Possible
https://www.amazon.com/Alternator-Re.../dp/B07LB74JCW Probably depends on amps as to what regulator is best. As you know yours is 42A.