go to a gun show, and or on line.
you can take one of the cherokee full style cheekpieces, cut it in half (length wise!), add some velcro to the underside as well as the top of the stock. and walla! easy on easy off acc.
i prefer the latest snapon/ snapoff one they have.
but i still make use of the "custom" one too. 1 thing i find interesting (if you can get over the notch for the charging handle) as well as using it backwards, is that i foung it worked well on a fiberglassed m-1a , for my scope setup on there as well.