To be economical, the shop would have to have both a CNC laser and a CNC punch. At this point you are talking about a shop with a couple of million bucks tied up in tools and a minimum shop rate of well past 100$ an hour. Initial setup and proofing is going require considerable amounts of time and resources. Simply the process of correctly nesting the parts to minimize material wastage and efficiently cycle the materials thru the tools will eat up more time. For the cost of setting this up, one could probably buy a full set of standard kits for everything that Van's has available, and still have money left over for engines and props for a couple of them.