I have a 1985 mk1a, fitted with the original push button radio cassette.

It's really knackered and I want to upgrade but nothing outrageous just a basic radio cassete or single play CD player.

The existing unit has a single plug fitting the car has two dash speakers and the underseat sub woofer.

Since I know SFA about electrics does anyone know where I can get an ISO adapter plug to make it as easy a job as possible for me.
