I have a Hogue® 77012 Ruger® 77 Mark II Short Action Heavy-Varmint Barrel Full Bed Block Stock and it comes with a very inexpensive, poor quality, recoil pad. I want to replace it with a LimbSaver AirTech® precision-fit recoil pad which is much higher quality. It appears the original pad can easily be removed with the two standard screws, but I would like to know which model number of the LimbSaver AirTech® precision-fit would fit that particular aftermarket stock?