Trying to locate the screw that goes into the top of the Top Snap on a Stevens Model 330. Looked at the schematic on the Numrich site, but it doesn't look like a screw and they are out of stock. Can anyone post a pic showing the top of the top snap on there Model 330 or offer a suggestion where I can locate the correct part. Tried my local Ace Hardware and found a Phillips head screw that I painted black, (a couple threads caught), but I want the correct part. Appreciate !!