Rear Storage racks

Need some more storage room in the rear so i’m looking at various rear storage racks and was wondering what most folks with a 900S use. I have a rear Polaris Deluxe bumper so It would need to work with that. I have seen the Ryfab model and a razorback offroad RBO racks online. Any experience with them or others. Kinda like the Razorback, it comes with Rotpax mounts on the sides it looks like. But its expensive. Also suggestion on where to buy them.