Where to buy 200 Amp Circuit Breaker for 0 AWG wire

No this is for battery relocation. 0 AWG wire is rated just over 200 Amps for maximum current. My amplifier will be fused with a properly sized fuse on a seperate line.

I just need a CB that accepts 0 AWG wire.

I already have a 200A CB, but it only accepts 4 AWG wire.