christ you have a challenge there:wow: hens teeth springs to mind? if you do find one, it will be hugely expensive, and next question is why? its rubbishTrying to find the small screen sat nav radio unit that was in some of the 156's, anyone seen any for sale.
Most of the threads advise to use an aftermarket HU, but the problem I face with those is that if I want Sat-Nav, I have to go for one of those flip-up LCDs and those never fit into the dash properly. Especially in mine since its a facelift dash.I have seen re-furbed units on the Blaupunkt website but they are expensive.
The sat-nav is not very good and the disc(s) are also expensive.