Western Arms Company: Trade name used by the Ithaca Gun Company on an inexpensive line of shotguns made in the 1930's and 40's. Not to be confused with Western Field, made for Montgomery Ward by Stevens. Worth repairing if in otherwise good condition, and the guns appear nearly identical to the Lefever Nitro Special, also made by Ithaca.
it is a Stevens, parts are interchangeable...
Numrich Gunparts.
You can find parts for many westernfield shotguns at Numrich gun parts. WWW.e-gunparts.com
Buy my 20 g companion,and there are your parts?wjw2010@live.com
Try your local gunsmith. The Riverside is a Stevens shotgun. If you can find out which model it is, you can probably find the wood at Numrich Gunparts
Numrich gun parts
A FEW parts are available from gunpartscorp website.
Depending on which parts, they may need to be made.
Numrich Arms should have them.
The 238 is similar to the 258. For parts, try gunpartscorp.com
i found a small list of parts at numrich guns and parts
Where can you find parts for your Charles daily shotgun