Microtech does all of their knives in batches. That's why you'll often see things that are out of stock. As a dealer I can't just call them up and order another batch of "xxx". They also do a ton of customs. There seems to be some internal discussion over what becomes a custom and what goes to production (matrix is one example).
Regarding some service, they can be a bit slow, but otherwise seem excellent to me. If anyone ever has any issues let me know and I'll see if I can help.