OK, I stopped looking for the A3 stock since I glued it up with TiteBond. I gently wedged it open; there's a round tenon on the receiver that fits into the butt. So, wedging the crack open so as to accept glue easily I found 2 other smaller cracks. I used a #50 drill to terminate the cracks, filled with glue and clamped with about 20 wraps of rubber-bands and some soft jaw spring clamps. Got good squeeze out along the cracks. Will have to let it cure for a few days since I'll need to now whittle up a new turn-screw that about 1 inch longer than anything I have.
Later that week...
Screwed back together, here's hopin' the rains let up for some live-fire testing this weekend.