Hey,
I found a PYE P2000 S3 Radio with +/- switch.
http://cgi.ebay.co.uk/working-pye-p2000t1962-3-classic-car-radio-12v-neg-pos_W0QQitemZ280230557479QQihZ018QQcategoryZ9903QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Andrew
I found a PYE P2000 S3 Radio with +/- switch.
http://cgi.ebay.co.uk/working-pye-p2000t1962-3-classic-car-radio-12v-neg-pos_W0QQitemZ280230557479QQihZ018QQcategoryZ9903QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Andrew