Looking for parts to a Topper model 88 20 ga . Almost everything is missing . I Have the Barrel , reciever , and the stock . The gun was disassembled by my Grand father a few years back . To make a long story short, he lost all the parts .
Try Numeric's gun parts. They are a great source of parts for discontinued models. I use them to get parts for ols Marlin and Winchester lever guns all the time.
There are very active B/S/T forums on in the NEF / H&R forums over on graybeards outdoors. You might have better luck hunting parts there. You might start here in their shotgun forum : http://www.go2gbo.com/forums/index.php/board,132.0.html