went to a Gun show upstate New York this am. Met the owner of Keystone Arms, 570-491-4867 Joe Manazza, he told me he has a good supply of Kerr slings, in the $50 range. Said they were in good to poor condition with some stains, he makes no quarantees with something that old. I dont know if anyone has done business with Keystone Arms before but his business card has a Thompson on it