I suggest you use google and search copycat recipes for knock-ffs of fast food and chaing recipe formulas, but realize that it is very hard to duplicate commercial production processes at home. The most successful I've heard of are the one from the Top Secret Recipe books and he has one for this chicken.

I think the Kenny Rogers fried chicken recipe is one of those that you may never find. The most I ever found was for his corn muffins. Would a knock-off of Popeye's do you any good? http://allsecretrestaurantrecipes.com/popeyes-recipes/popeyes-fried-chicken-recipe/