Is that a quad breaker with handle ties to create a 240v/40a and a 240v/20a,
to fit a Murray ("industry standard") like panel?
If so, I just bought one for about $25. All of the local electrical supply
houses had them. Maybe they just don't carry the Homeline model, but there
are a number of brands that all fit. My panel is a Sylvannia; just try and
find one of their breakers!
Using one brand of breaker in another manufacturers panel is only code
compliant if the breaker is marked as recognized for use in that panel.
As far as I know only Thomas & Bettes have gone to the effort to get
their breakers tested to be used in other panels. There is a list of
the panels with which they are compatible in the package with the
breaker. If a breaker is used in a panel for which it is not listed or
recognized by a testing laboratory any resultant damage may not be
covered by your home owners insurance.
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