I don't know if this is even remotely helpful but if you're looking for a new one the best bet I think is to get on the back order list at one of their Distributors (Graf & Sons, Brownell's or Creedmoor Sports). They had some hiccups with some components which are now squared away and they have started shipping them again, but it will take some time I think to catch up with demand. Anyway, I have one coming from Graf's but I sat on the back order for months and they (Graf) did not think that the shipment which just came in would fulfill all of the back orders they currently have. The new ones (MARK II) come with AZTEC installed.
If you're looking for used then disregard the above; there may be someone looking to offload theirs for whatever reason., Good luck!