Bus Bar Stock

If your heart is really set on breakers then you'll need to build your own bus bars to hook up the supply sides. These pre-sheared strips of .025" brass stock can be drilled at intervals equal to your circuit breaker spacing.  Be sure to use  internal tooth phosphor-bronze star lock washers  under the heads of the screws to produce and maintain a good electrical contact with the bus.  .025" x .50" x 12" strip.