I don't know if they have one, (if you've seen it then I guess they do) I've never seen one. This is a pic of my truck, I have almost every button you can have except the jake brake (diesel option only). Maybe you could order the power outlet button and wire it to work for your lights in the bed??? Sorry I couldn't help more. maybe check this site out...
https://www.dodgeparts.com/oe_parts_catalog.html?osCsid=49516ae428c1145e1de352085aa8ca4d
https://www.dodgeparts.com/oe_parts_catalog.html?osCsid=49516ae428c1145e1de352085aa8ca4d
