Try :
http://www.highenergycorp.com/ for their line. They list as a distributor:
AMS Technologies Ltd.
Electronic Division
Suite 10
33 Chapel Street
Buckfastleigh
Devon TQ11 0AB
United Kingdom
Phone - +44-1364 644295
FAX - +44-1364 644237
Territory - United Kingdom, Ireland, Scandinavia
I have no clue what the terms are, but it's a start.
I gather 'doorknobs' are hard to find over there, too?
Try googling around too, you might find a few others. Newark electronics used to sell 'em too, but i don't think the get much farther east than Maine
