Try Gun Parts Corp (Numrich) or Jack First.
1947 - 1953
I would try numrich gun parts corp.first.they can be found on the web.
@ 100 USD
You can get the bolt & parts from Numrich gun parts, BUT, the entire bolt will cost you more than the entire shotgun is worth from Numrich. I'd put a "Wanted" ad on gunboards.com if I were looking.
i just bought one for $80
Bolt action made by Savage/Stevens. $75-$125.
stevens bolt action 22 model 840