wheels

Morning All,
Scrooge here again. Just spent a week in Baldwin, Mi. and I found out that the tires I have on a 2014 550 are really not to good in the deep sand on the trails. What I was hoping someone could point me in the right direction where I could get another set of wheels so I could put the stock tires back on. It seemed like all the other riders had what looked like the stock tires on. Any help please.
Thanks
Scrooge