I would not sell it just get a new wood stock, it may take some looking but you should be able to find one. There is a replacement synthetic stock avalible also. Where did it split, behind the tang, thats where Camp 9 and 45 usually split? Got any photos of the split?
These are not pretty but it will work well as a replacement if you cannot find a wood stock
I go back and forth between the OEM wood stock and the Choate. Somebody always asks about this........the rear folding part of the Choate stock angles downward so you can get a good soild cheekweld, if it was straight your head would be too high above the barrel to use the sights or an optic. Is actually very comfortable and works well.
These guys are the Marlin parts kings but I noted they did not have any Camp stocks in now. They may be able to steer you in the right direction though.