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Numrich Arms in West Hurley New York.
Yes, they are. As with many stores, the Westernfield brand belonged to Montgomery Wards stores. Mossberg made their 26C model, but marked it with Wards brand and model number.
This Westernfield is the same gun as a mossberg model 353. this may help find parts easier.
The Model 336 was not manufactured by Winchester... instead, it is a Marlin made lever-action. Contact Marlin through their website for parts & service. Bert H.
I have a 865 Lever action, it seams to almost double feed, and does'nt want to eject the shell very good.
search for numrich gun parts corp they have a huge catalog of gun parts, we have always found any part we needed there
Made by Mossberg as their model 472PCA. Some parts are available from gunpartscorp if you need them.
Worn parts, dirty gun. Not possible to diagnose it remotely, you need to see a gunsmith.
Gun shops, gun shows, want ads
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your best bet would be numrich gun parts corp.They can be found on the web.
Try e-gunparts.com and Marlin