I need a used action slider tube and nut for a Mossberg 500A 12ga. Must be the longer two-legged tube 7 3/4" (or 7 5/8"), not the shorter 6 1/2" part. I'm in Portland with a fairly flexible schedule and ready cash. Please email email@example.com with your price and some contact info. I'll respond promptly so we can make a deal. Thanks in advance.