Help, I need a cover(?) for a cast iron junction box. It is 3 1/2 " in diameter and has fairly fine threads on it. The box is about 5" and 2" deep and has five pipe thread inlets. I picked up the box with a lot of old pump guts, so i know it came from a pump, I just don't know what maker. I have the perfect place to use this thing if I could find a closure. Nothing at the local hardware stores come close (all either 3" or 4") Anyone have one in your scrap pile you're not using? I'll gladly pay shipping.