Looking for info on a rear stock for a marlin 336 in 30-30. Iam in need of a stock for my buddy and am wondering what will work his is and older model with flat top receiver I know there are different fore stocks but wondering if all years and series rear stocks will fit. Checked on Boyd’s gunstocks and they only list a 336 straight grip or pistol grip. Checked gun parts corp and they have parts list for numerous different models of 336. Any help much appreciated