Have a pic from the top side to gauge how much wood is there?
If nothing else you may be able to epoxy the crack then whittle out a channel to drop a pice of all thread into which would then be epoxied into place. Or, run an 1/8"- 3/16" brass pin or piece of brass screw or all thread epoxied in all the way through the stock.
If nothing else you may be able to epoxy the crack then whittle out a channel to drop a pice of all thread into which would then be epoxied into place. Or, run an 1/8"- 3/16" brass pin or piece of brass screw or all thread epoxied in all the way through the stock.