Check with E.D.M. arms. They are making it. It is basically a Pauza. http://02bfe1c.netsolhost.com/products/Semi50.htm
Should come in around $10K with tax.
If you want an original it would likely be more based on its rarity.
Good luck on your quest KentMike. From what I have heard, the Harris M-96 didn't work very well. They had to grease the cases of every round in order for it to even cycle.
Curious to know where you learned of the need to grease rounds. What is the source? Thanks in advance. Any idea on pricing? I'm finding that they are SUPER RARE. Can't find any reference to prior sales anywhere.