Look if you really need a cheek-piece, make one yourself.
I use a shell holder that fits around the butt, and add a chunk of foam, cut to your specs, and slide it inside the shellholder, maybe "hotglue" or epoxy it in place.
There's one fella that has help video's on youtube,( I cannot remember his name) that uses a piece of wood with two dowels attaching it to the stock, but is removable, and he slides a nice shellholder right over it.
