Anyone know of a source for old/obsolete breakers? One of the breakers in the panel at my parents' house failed. It's a circa-1964 Square D panel, model QO-8R0, and the breaker is a 15A 120/240 twin/tandem one.
The failure mode is that the breaker in question tripped and cannot be reset. An electrician confirmed that it needed to be replaced, but hasn't had much luck finding a suitable replacement locally. There are no known issues with any of the other breakers.
Bay Breakers/Bay Power seems to be one of the go-to sources for obsolete breakers, but they haven't responded to a message I sent via their web contact form.
Anticipating the inevitable recommendation, upgrading to a new panel isn't in the budget right now.