You'd have to look for a specialist online or in your local area- using the original as a template they would draw up a 3D model and then machine it using CNC, although since it is a rather basic item, they could just take some measurements and make it free-hand on a lathe i suppose using a square bar of Ti ( I make it sound so simple)...
With the money you have invested in that rig, it shouldnt be too much of an issue i dont suppose....
