Buy parts for 410 Stevens model 67 pump shot gun.
www.gunstockinc.com
I have parts for that model. sales@countrygunsmith.net
I have a single shot Springfield shotgun but there is no model number anywhere. It looks just like a the Stevens Model 94 and has several identical parts although I am not sure what series of the 94 it is.
It is a Stevens 94 series shotgun, which was produced for many years. Would have to see the parts to determine which variation of the Stevens 94 it is. WAG would be 1960's-1970's.
Check on Numrich gun parts corp website.
It's a pretty common gun, so any gunsmith should have a source for parts.
Yellow pages category = GUNSMITHS.
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.
Try Numrich gun parts corp.or gun broker.com under shotgun parts.
Numrich Arms should have them.
A FEW parts are available from gunpartscorp website.
Numrich gun parts. Parts availability depends on if you have an old model or new model. There is a nice schematic on their website listed under Stevens 101-7