I thought most gun / bow mounts had universal mounts for flat mounting surfaces as well as tubular. From what I can remember, I thought some members were saying that some Polaris Lock and Ride mounts work as well as some of the mounts for the CanAm's. For my rear box, I removed some of the bolts that hold the plastic rack to the frame and drilled corresponding holes in my box and used a slightly longer bolt with a washer and bolted the box that way. For my front basked I did the same thing. I don't use any gun / bow mounts, but I had them on my RZR and they were a universal tube clamp system.

For the rear box, the 2nd seat is removed, but can easily be reverted back to a 2 seat configuration. The box is actually for a Kawasaki Prarie.

The front basket / rack is a universal one from Quadboss. I find it's easier to make it work for me than a front box would be.

Good luck in your searching.