Has anyone replaced the tires on their 03 dually? If so, did you have any trouble finding tires? Today, the man that owns the local Good Year store stopped me and said that he needed tires for another customer with an 03 dually and couldn't't't find but 4 available to him in the state of Texas. I stopped at a large tire retailer (Discount Tires) just to check it out, and they said it was a problem. They called Good Year and were told that there were a total of 60 235/80R/17's available in the US. Not only that, they were not in production. I need the 10 ply tire because of the type of work I do. Are there any other people making this size tire? Don't need tires yet, but after 3 1/2 months and 36,000 miles it won't be long. Any comments?