I don't know if this would work with this case but on my great grandfathers old pump shotgun the fore end had a huge crack going down it and he used JB weld to fix it. Just an idea but I like the idea about injecting wood clue into it.
"come on you sons of b***hs! do you want to live forever?" Sergeant Daniel Daly, USMC, Belleau Wood France June 6th 1918
"You can be as mad as a mad dog at the way things went. You could swear, curse the fates, but when it comes to the end, you have to let go" Benjamin Button