Replacement part needed - Glenfield/Marlin Model 25 22 bolt action rifle

[Par shooter]

Any suggestions on a where to find a replacment bolt for a Glenfield/Marlin Model 25 bolt action 22 rifle? Gun was made around 1975.

 

[dfariswheel]

Gun Parts Corporation:

http://www.e-gunparts.com/productschem.asp?chrMasterModel=082Zz25 BOLT ACTION