Your best source for parts would be a local gunsmith. www.e-gunparts.com numrich gunparts
Numrich Gunparts.
You can find parts for many westernfield shotguns at Numrich gun parts. WWW.e-gunparts.com
The Western Field mod SD57 was manufactued by Stevens as their model 87. Limited parts are available from Gunpartscorp.com. Look around for other sources.
try numrich gun parts corp,they are on the web.
The Western Field 808's were a Savage Mod 87. Check gunpartscorp.com
Your gun is a Savage model 620. Try gunpartscorp.com for parts.
Take it to a gunsmith. He has much better availability for parts. Western Field was a Montgomery Wards brand, so there isn't going to be a lot of collector interest.
Numrich gun parts
it is a mossberg model 500a . the code for western field is pretty easy once you look at a few of them. parts are very easy to find. eBay if you are feeling lucky. or www.e-parts.com for a great company. your shotgun is very popular and there are lots of upgrades out there for it. good luck
Have you tried Numrich Gun Parts? They have a lot : www.gunpartscorp.com Good Luck
I would start my search at Numrich gun parts corp.They can be found on the web.The westernfield model 808m was made by stevens firearm company.The stevens model 87 is the same gun as your western field 808m.
If there are parts out there these people most likely have them. Numrich Gun Parts Corp. I have used them several times and there good people to deal with. http://www.gunpartscorp.com/