Here's one that's ideal for a 3-hole dashboard (Splitty, early Ghia or Oval Beetle)....
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MESE%3AIT&rd=1
....and a 12v Emden model with VW-logo knobs and chrome faceplate....
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MESE%3AIT&rd=1