Alfa Romeo 33 Quattro speedometer

[bdow]

Hi
I dont see my car anywhere in your site.... Probably because its a 1.5l station wagon. (Alfa 33 Quattro Pininfarina, 1985) My problem is a broken speedo which no autoelectrician in Australia wants to touch with a bargepole. Does anyone know a way of fixing them? Apparently they are different from normal speedos and when they break they really break. I'd be happy to patch it up with an add-on if necessary/available. I just want a speedo that works.....
Thanks in advance