I have seen some on eBay. Spendy. I had the same problem a few times while plowing and was thinking about getting a set of aftermarket wheels and tires that are a little bit taller for some extra clearance. Just not sure what size would be best without having a lift or anything changed on the suspension.
We've had alot of luck just finding car or light truck tire chains and making them work. Ususally you can pick them up at yard sales or thrift stores for a couple of bucks.
One of these tire chain convos on one of these forums I talked about screwing up tires. I think he was a fisherman wanting better traction on ice. Short story is....when I used to ice race on two wheels....I used a top notch product called Kold Kutters. The heads were directional blah blah. You would want to run a liner and then a tube but nothing compares to tire screws.