I have a Great Outdoors Smoky Mountain Smoker that I have enjoyed for approx. 1 year. recently the Acme plastic nut that attaches the unit to the propane tank disintegrated into a thousand pieces. I have searched but cannot find a replacement connection that will fit into the regulator which seems to have a smaller port and threads than the standard 1/4" NPT threaded replacement acme nut. Anyone have any ideas for me?