I picked up a used Tri-Star TR-MAG O/U this weekend at a very good price. The gun is made by Emillo Rizzini in Italy. Anyone have any idea where I could get IC and Mod choke tubes for steel shot. So far I cannot get in touch with Tri-Star and cannot find after market tubes at the usual makers. Anyone make custom tubes for odd size(E. Rizzini) barrel threads?