I've acquired a nice old-style Wingmaster stock and forend to put on my 870 Express (no checkering and the forend just has grooves cut across it). The butt, I'm told, is a bit smaller than the new Wingmaster stocks or Express stocks. I need a source for the older Remington recoil pads that will fit my stock or for a pad that can be cut / ground down to fit. Thanks for any info.