Try e-gunparts.com
MARLIN'S WEBSITE! about $13.00 each.
type in marlin model 80 on google..its the same clip
Factory magazine for Marlin 80 DL $18 + $7 shipping at ammoclip.com
Glenfield was made by Marlin. Check with a local gun shop.
On my model 20 its on the left side of the barrel directly up from the clip.
It was made by Marlin and is a pre-war version of the Model 80.
Bolt action, clip feed 7 shot, made between 1960 and 1966.
I believe you have a Marlin 35 Cal. Model 336 CS rather than a C5. Look again.
ammoclip.com $18 plus shipping The Glenfield model 25 was made by Marlin as the model 80
Marlin 81
Made by Marlin....same as the Marlin Model 80
Made by Marlin....same as the Marlin Model 80