Use a stockmaker who uses a Don Allen machine. Try Al Lind.
There are many duplicators in the hands of stockmakers, but the gents are sometimes hard to find!
The Allen and the Hoenig duplicator are top end machines, closely followed by the Green. Generally a stockmaker owning one of these machines has advanced to a skill level high enough to fully use the capabilities of the machine, not to mention the dedication to "step up to the plate" and purchase one, as they are very expensive. Sadly with the demise of Dakota Rifles I believe the Allen unit is no longer manufactured, and I believe Mike Greene no longer builds duplicators.
A few highly skilled machinists have built their duplicators. Sterling Davenport is one, I have seen his machine, it is excellent. And I have used a massive 5 station duplicator built by Leroy Wisener, the current owner resides about 20 miles from me.
I have had my hands on a Allen and a Green, and like both. Saw a Hoenig once, but did not use it. The Northstar I own has some unique capabilities not matched by other duplicators, is a very robust machine, and after a learning curve I feel quite good when using it. Not saying it is better than others, but I think it would be a good unit for a full time stockmaker. It has a lot of power going to the cutters and easily carves the toughest woods.
I will do a litle research and pick up names of stockmakers with duplicators that are in the business. As my signature says, I am not in business to work on stocks or guns. I only work on my rifles, this is what retirement is all about!
Carving the final stock is easy on a duplicator. The real work is in making patterns, especially if one is making stocks that are vastly different from the common manufactured stocks, which may be used for a pattern. I have around 30 different pattern stocks for Mausers, M70's and Brno/CZ actions. Over the past year I have put many hours into developing my ideal big bore stock, to fit me, with proper pitch, drop, cast off, pull length, and overall stock dimensions that really fit my statue. Now that I have a proper pattern, it is time to carve some real stocks!