I don't know whether y'all have heard yet, but Coker is no longer making white or gray clincher tires. They and Universal have some sizes and tread types left in stock, so you can still order some of them. If the kind you want are on their websites, you can order them there. But there are also a few odds and ends which are not listed there, so you can call them on the phone to see what they have. Universal has reduced prices on a few odd ones; Coker doesn't. I don't know whether any of the parts vendors have any or not.