looking for semi tire casings for pulling semi.

I am looking for 8 Michelin XDN2 semi tire casings that I can have recapped. They need to be for a 24.5 rim. They are the ones that are 1" wider across the tread than a normal semi tire. Is there any one that knows where some are. I think Goodyear makes one also, but do not know a number for them. The tire place is supposed to be getting me an actual number, but these things are hard to find. Any help is much appreciated. I am looking for them for the pulling semi.

Thanks
Mike