I had to buy a gun to break. Don't have it now. I do have a parts list from Stevens i.e. exploded diagram. Not much use unless you can source a second hand gun or part.
The 238 is similar to the 258. For parts, try gunpartscorp.com
You might find what you need at webdept@gunpartscorp.com .
Numrich has a gun parts website. Best bet for any gun parts or schematics...
NUMRICH.com
the value of a 1948 Stevens double barrel shotgun 16 gauge. Hammerless.
www.gunstockinc.com
it is a Stevens, parts are interchangeable...
Have you tried e-gunparts.com?
It's a pretty common gun, so any gunsmith should have a source for parts.
I would check at Numrich Gun parts corp.They may be found on the web.
Riverside was manufactured by Stevens, so if you can identify the equivalent Stevens model, you should be able to find parts. Check with a local gunsmith.
I would start my search at Numrich gun parts corp.they may be found on the web.I would also look at gun broker.com.under parts.