Something else that I had though of is, instead of designing a WHOLE new diaper for the AB/DL community, why not take something like an Abena X, or just an Abena super, and redo the cover in a more appealing fashion, or color combination? use the filling and inner liner form the Abena (I use this as an example because to me the Abena X is the clsest thing for adults to the pampers line in design and function) and just have them covered with a different pattern of plastic (or cloth like if you wish)
The trick is to get the manufacturer to do so, and you might have to provide your own design for the back sheet, in color and pattern etc, and the materials also, which I could imagine would cost a pretty penny. I'm not even sure how this coul dbe accomplished and what negotiations would take place, but I think it would be a better alternative, than coming up with a whole new design, which would require a new machine etc.
Sometimes you have to work with what you have to get what you want.
qwack