How about just cranking out a boat load of quality Sub-2000 rifles, in Glock 17, and be done with it.
I think that goes across al Keltec platforms. Though I have noticed the flow of Sub2000s has been slowly increasing. Glock mag versions still command a premium but its getting better.
Also frankly I don't think Keltec cares if they crank out boatloads, they don't seem to be trying to sell on margin. They greatly favor getting a number of highly desirable guns into the market, let people pay what they want. Not saying its right, but it does make sense why we keep talking about them!