Why can't you pull off sthg like below example. A universal adapter for PORSCHE 986/996 for let's say Pioneer, Alpine, ect, whatever brand is HOT atm.
Just go to the aftermarket radio shop and snap pics of the manufacturer's connector and put 3~4 different type of adapeters together for the crowd (Plug&Play man). Can't believe there is a hundred diff adapters for each deck manufacturer?
(thread hijack lol)