A Delco-Remy 1119220C is a 12 volt aircraft regulator. It will work on a car or truck, also. Here's one listed on Ebay- - - -used but possibly serviceable.

https://www.ebay.com/itm/194695116297

I can probably diagnose and/or repair the "DOA" unit. Since you've got the minimum number of moderated posts in now, semd me a private message by clicking on my username. I've been working with DC generators and regulators since the early 1960's.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!