matching up an Old style (mid 80's) Cutler Hammer GFCI breaker

[LocalHero]

I have a 1984 house that seems to have a bad CH GFCI breaker. Lowes carries a few CH/Eaton breakers but the GFCI they have doesn't look like mine:
https://www.lowes.com/pd/Eaton-Type-Br-15-Amp-1-Pole-Combination-Arc-Fault-Circuit-Breaker/3659370

I replaced it temporarily with a non-GFCI that did fit:
https://www.lowes.com/pd/Eaton-Type-Ch-15-Amp-1-Pole-Standard-Trip-Circuit-Breaker/4747755

But I'm wondering where to go and how to figure out just what replaces the GFCI I have.

I think since I'm new to the forum, I can't post pictures but it looks a lot like this one on Amazon:
https://www.amazon.com/Eaton-CHFGF115CS-15-Amp-Breaker-Circuit/dp/B00F3IY8RU#customerReviews

THe breaker is 4" long, 3 1/8 wide if I include the test button, and 3/4" thick. Is that Amazon breaker the right one? There's very little useful ID information on my breaker but it does have "Class A Group 1R"

Final note, the GFCI that I removed had two hot wires attached. I thought that was not code but I'm not sure and don't know what code might have been in the 80's. Should I be buying two GFCI breakers and separating them?

Thanks

 

[Little Bill]

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