It looks like a really well built product, but with such a small market I'm sure he's making them one at a time in a converted corner of the hangar.
I bet designing them was a blast, and the first ten nets were probably fun to sew up. The next ten were probably rewarding, but after that it's just mindless repetition....measure, cut, sew, ship, repeat. Doesn't take too many hours of that before not answering emails sounds like a very good idea.
I made my own cargo net out of 1" climbing webbing. I laid it out and held it together with a few stitches, then took it to a seamstress for sewing. Afterwards I re-stitched all the webbing squares with 60lb test spectra fishing line. The top connections are climbing anchors bolted to the stock seatbelt attachment points, and the bottom connections are the Atlee Dodge folding seat rails. I rigged up a couple adjustable side attachments using whoopy slings attached to the rear seat anchors as well. I just use carabiners for the hardware...there's enough slack in the net to make them work.
It doesn't hang flat and pretty like mountainwave's does, but it holds cargo just as well, maybe better. A loose-hanging net will actually withstand greater forces before the attachments pull out, though by exactly how much I can't say.
I think these are a must-have for anyone hauling cargo, especially with the rear seat removed. I personally know of one avoidable death from flying cargo, and I'm sure there are many more. The BAS shoulder harnesses, survival vest, SPOT and helmet aren't going to do you any good at all if a 50lb cooler is plowing into your C3 at 40mph...