I would like to get the screw in replacement pad (SVL) for my 12 gauge remington 870 express synthetic stock. Looking in cabelas and wondering if the (532-Remington Synthetic Stock) is going to fit. It doesn't specifically say it's for an 870, or are all the rem synthetic stocks the same? They do have another listed, (777-Remington 870 Wood Stock), but mine is obviously not a wood stock, but is an 870? Could someone help please?