Ouch!!!
That does suck indeed. Something some slow setting epoxy could cure, or is it really splintery? If it's not all of the way through the wood, there is a chance of getting a big syringe full of thin epoxy into the gap, then fill and clamp. depending on where exactly the crack runs, if there is any internal access, like where the action sits, you could also grind out a bit and fill with glass cloth. Ultamately I s'pose it would be good if you could find a hidden place to drill and run a dowel rod, but chances are that'd be tough. Yup, $25 at the gun shop sounds good...if the stock looks that good I'd rather let a pro do it...especially for only $25. Of course if you could find someone that makes stocks for that rifle, it might be cool to get an aftermarket stock also...but then it would most likely cost you 2-3 times as much as the replacment stock from the manufacturer....Huhm, so many options...the best option would be to hunt the UPS guy down and beat him with the broken stock....THAT my friend would be justice:)
btw: I'm joking, please don't run out and beat up mail men...most of those guys are pretty big, chances are they'd beat you first.
Dan