Where to buy 200 Amp Circuit Breaker for 0 AWG wire

I wish it was lugs I would have put ring terminals on the wire and been done with it. Its gold plated with allen bolts that secure the stripped wire. Even the current plastic case is only sized for 4 AWG wire with insulation. I can’t get the cover on over the 0 AWG wire even if I could find a way to fit it into the block.

I wish I could find the CB locally for $50.