I've known salespeople that will work for straight commission. You may not even need to offer a stake, although that might be a good idea to increase the chances of retention.
I'm a big proponent of bootstrapping, but you may still want to start the process of talking to investors or maybe even a bank. Asking someone to jump from an established ship onto your new ship is a lot easier if you have cash to guarantee them a salary.
Another thing to consider is partnering with a totally different company that sells to the same people. Their salespeople sell your product, and they get gratitude/commission. That doesn't work in all industries of course.
