I've bought a 2006 JD CT 322 with about 800 hours on it (pretty much all on gravel). I'm just using it aroung my own business building my greenhouses and moving stuff. I was going to replace the treads a couple hundred hours ago when I got it because they were worn smooth but a dealer told me to run them till the treads fall off before you buy new ones. OK, it's 200 hours later and we've actually worn the treads to the point that one of them broke halfway through. Where do I get decent quality new ones at a decent price? I'm in western KY.