I have also been searching for creepers manily for Rock'n'Roll. Found this site doing a search and located the fashion article which was of interest. So far my leads also indicated mail order or Eastern States. I will check out the Viewfactory as they sound like a possible lead. Here is a link to see the catalog of TUK creepers.
http://www.instepdrmartens.com/
Thanks for the information
Sput'