Your westernfield model 732 rifle was made by mossberg as the mossberg model 810AH,for montgomery wards(westernfield).
i have a 20ga wards western field 14m 215a it has 3shell clip
We have them. sales@countrygunsmith.net
have good 16ga no clip shoots good model 228
The Western Field bolt action shotguns look to be Mossbergs. Try gunpartscorp.com
You might have a chance on gunbroker.com
Made by Mossberg. We have magazines. gunshop@nctv.com
http://www.e-gunparts.com/productschem.asp?chrMasterModel=0840z353&SortBy=DESC
I believe what you hae is a Mossberg model 42
Vintage gun parts such as the needed magazine for a Model 46A Western Field 22LR can be found at major gun shows or through online specialty companies such as APEX and Numrich.
i have one my dad got it in the sixtys i need a clip for it though its a mossberg 353
As far as I can tell from my research the 04m-497a is a version of the Mossberg 42. I've found a clip on http://www.gun-parts.com/mossberg/