Having failed in trying to fit my steering wheel boss/wire in a horn, I decide to but the original wheel back on

But in doing so I've managed to snap the metal prong that's used as a contact for the horn to the rotary coupler

Does anyone know if this bit can be bought seperatley? I've looked no the microcat but can't find it

Thanks

Ade

Stolen some photos from the internet to show the bit I mean