I emailed NDS about the order I placed on 11/7/17 for a set of 603 receivers and a charge handle. This is the response I received in a very timely manner.

For the items that you have ordered we are currently working on orders taken in early October, 2017.
When we are close to having available inventory for your order we will contact you.

So it would seem my wait is soon over and I am very excited to assemble my first clone. I just wanted to share the latest news on where NDS is on orders.