I just thought it made sense to list places that claim to have Sony Stalk adapters. Please add more and if you have comments about them, leave them, too.

http://www.audiotechnik-dietz.de/

http://www.connects2.com/

http://www.soundgate.com/

http://www.caraudiocentre.co.uk/category.asp?category=368 (these seem kinda generic and lots of places have them)