ive got a 870 20gauge youth model that i want to put a pistol grip on to. i cant seem to find one. So my question is does anyone know of one that fits 20 gauges (other than the blackhawk that costs $100, F#@K that.) Or does anyone know if a 12 gauge pistol griop will fit... im not worried if its just a little big and overhangs the gun, the gun is just going in a back pack for protection on long multinight hikes. For the love of god someone help me haha... its been a frustrating few hours on the internet.