Sounds like the kind of thing that would be perfect to source from a Chinese manufacturer if you could afford to purchase in bulk.
You would be able to have them custom built to your spec if you really wanted.
If you don't have the budget, maybe you could put the call out for another member or two to join in on a bulk buy. If you do bring a few members with you, consider choosing international members so you can each have your own territory to sell without all cutting each others throats selling to the same market.
You could try checking out sites like alibaba and trade key for buying leads.