CB Range discussion

I love the CB6000s model but I’ve snapped its back ring twice now and am keen to switch to metal. Could anyone recommend an open-style metal cage, similar in fit to a Jailbird? My base ring needs to be 2.25 inches with the shortest spacer available. A tube that is just a touch wider would also work well for me, as I find the CB6000s length spot on.

Appreciate any advice.