Taz 6 Broken Z coupling

I broke a taz 6 z coupler. The store appears to be out~ can anyone point me to a store that might carry them or suggest an alternate fix?

These are easily available on Amazon. Just make sure the ones you get fit a 5mm shaft.

Specifications

Designed for two 5 mm shafts

Length: 23 mm

Width: 16 mm

Material: Anodized 7075-T6 Aluminum