BTM - they are around but you'd want to have very good money on it to get one, as they're becoming very collectible in Japan, for obvious reasons.
As a fellow importer, I probably have access to more information than a fair number of you, and can tell you that J-Spec are very honest with their estimates. It's easy to underquote people in order to get their business, but in the end you don't keep customers that way. J-Spec have been around for a long time with good reason.