http://www.cleverscampcamp.com/ozark-trail-camping-parts/

I lost the plastic screw on the little piece of my Ozark Trail camping queen mattress. What can I do?
The mattress is useless without him. It is 1 and 1 / 4 inches in diameter and has a plastic cap that screws onto a bottle of water. Would something like this in a hardware or something? The places that sell mattresses do not sell parts.
The company that the mattress will have replacement parts for it. What is the name business? Do a Google search for the company and then contact them.
Pigeon Creek Mountain Bike Trail, Mtn Home, Arkansas