Well after wiping away the blood, sweat and tears, and going through about 6 prototypes, I finally put together a couple of drop leg subloads for a good friend of mine. I was originally going to just come up with some mag pouches for his P90, but after trying to figure out where one could stick their P90 mags, he figured a drop leg subload would be best.
The materials I used are: Denier Cordura 1000, 2 inch polypropelene webbing for the straps, 2 inch side release buckles, 2 inch sliders to secure and adjust the webbing straps, 1 inch heavy polypropelene for the molle webbing, heavy duty nylon thread, 2 inch plastic loop ring, 1 inch plastic D ring and binding tape for around the edges.