They have a couple of these on ebay. I think this is exactly what our 1st gen 12v use, someone correct me if I'm wrong. Would be good to have one for a spare.
http://cgi.ebay.com/ws/eBayISAPI.dl...&category=41505&sspagename=STRK:MEBWA:IT&rd=1
Steve
http://cgi.ebay.com/ws/eBayISAPI.dl...&category=41505&sspagename=STRK:MEBWA:IT&rd=1
Steve