I think LeGrand Electric carries quite a range of DIN rail and other connectors, but I don't have their catalog here.
I tried their website, but it's not a lot of help. However, they link to "Pass & Seymour" as a North American distributor, so it might be worth a try there.
I couldn't find anything on a quick search of the site, but here are their links: http://www.passandseymour.com http://www.legrandelectric.com
[This message has been edited by pauluk (edited 10-09-2001).]