Seems like a tricky one, I don't see how a wholesaler would be willing to trust you given you're not the manufacturer or distributor. So if they fail they have no recourse.

And retail will always move slow, it's an expensive product so there's never going to be much volume. Perhaps you could try cutting their price to wholesale and sharing on some deals page. (If this site gets bigger, we'd like to have something like that here)

How did you even get five?? Are they brand new?