Well, now that you have the prototype, I would suggest talking to Steve about it. They would typically hire you as either an external designer/vendor, and then make an offer to buy your design/prototype at a fair price. You might even be asked to help with the production of more units with Dakota as
you have that relationship with them.
If you want, pm me and we can talk more offline, as I've done a number of projects that went into limited production.
Greg