Rhinobox with Rambox

[BigWorm]

I was recently set to purchase a wolfpack 325pack13 5tth wheel toyhauler but had to back out of the deal when I couldn't come up with a good hitch solution. I was going to use the reese sidewinder but reese does not make a sidewinder compatible with the Forrest River rhinobox pinbox. Has anybody else had this dilemma and what did you do? I love my rambox and don't want to get a new truck because of a weird pinbox. For reference I current have a b&w turnover ball and have the factory puck kit on hand to install