WTB - Fuse Block or Circuit breaker panel

[spillmk1]

Hello,
I'm looking for either a fuse block or the parts required to upgrade to the later circuit breakers.
I've found some breakers which I think will work.
But I'm not sure what "bracketry" goes with that upgrade.

Thanks for the help!!!
Keith

[emptyhead]

I have to check my garage to see if I still have any pieces that go to the circuit brake holder will let you know.