Polaris doesn't offer a four seater as factory option that I'm aware of. Here's a link to the facebook page with the place I know in FL that does it. I see this one and another posted, but this guy seems to have the most consistent positive feedback from what I've noticed - https://www.facebook.com/Undergroundautostylingsrq
Bunch of pics on there with slings that have been converted to give you an idea. Who's going to ride shotgun if you do it? lol
Thanks for that info I'll jump in there and take a look. The miss will still ride shotgun, the dog likes having two seats of back space.