I would take the breaker in to them and let them advise me. I have done that with a few other items and their advice has been spot on.
It depends on what kind of breaker do you need. Google the breakers name and see who has them.
If they don't have one in stock, they will be able to order it for you. The big question is which brand you want. They don't sell GE. If you call they can tell you if it's in stock. Though sometimes you have to wait in hold for awhile
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