Last week I spoke to two companies trying to identify a couple of holsters and both stated they were having heavy demands on certain models. Know that doesn't help you nor answer your questions, but you might be caught between several large demands.
I noticed Hume did not have any products listed in the overstocked or clearance section, and stated in their order section that for items not in stock they would ship in 16 weeks but I don't know if that includes custom orders.
The Greatest Enemy of knowledge is not ignorance,
it is the illusion of knowledge.--Stephen Hawking