PJG,
The Official Bottleheads are good about returning emails, but the best way to get in touch is to call them. Then there is a problem that the spam filter sometimes grabs a good email. I have read that this has happened before.
Bottlehead batches the kit assembly. As they get enough orders for a batch, the parts are collected and then they kits are "assembled" or bags put in a box and shipped. So it often depends where in this cycle you order. Sometimes a critical part can be delayed from a supplier, for instance the top plate or the transformer.
On the product page, two paragraphs above where you ordered they estimate a 3-4 week backlog. I have no idea if that has been updated recently.