There is a guy here in Willow that make custom drags of the Yellowstone type. He is called Willow Iron Works. His name is Bob and tell him Trail Boss sent you. 495 1201
It takes him about 2 weeks or less to put one together. The price is about the same but no shipping. These are built a little heavy duty as I help him from all the Yellowstones type that I hve broke and bent up over the years. He just lives up the street from me. I don't know what you are towing with but 6 foot wide is is huge! Even with a UTV on tracks the biggest has been 5'5" x 10'. Standards are 4'6" x 8 for most snowmachines.
If you need more info you can also get a hold of me!