I would find Numrich Gun Parts online and contact them. They will probably be able to help.
i order two for my model 56 on e-gunpart.com.
Try e-gunparts.com and http://www.wisnersinc.com
Try e-gunparts.com
That is a Marlin mdl 80. try website for gunpartscorp. look under Marlin 80.
MARLIN'S WEBSITE! about $13.00 each.
We have 10-rd magazines for that model. sales@countrygunsmith.net
The Ranger 22 was built by Marlin firearms, try a clip that fits the folowing Marlin Rifles. 50-50E, 80C, 780. You are looking for something that was built in the 1930s.
you can find maybe four of them in Columbus Texas you will need to ask around for mr.potter which will be very easy and he has some that he will probably give you for a resonable price he does not own a phone but if you make the trip it will be worth it
Try http://e-gunparts.com/ It was made by Marlin and is a model 980 IIRC.
Gun shops, e-gunparts.com, gun shows, want ads, etc..
I would search at either Numrich gun parts corp.which can be found on the web,or Gun broker.com.under gun parts.
ammoclip.com $18 plus shipping The Glenfield model 25 was made by Marlin as the model 80