yes i own one, ans am currently trying to find a diagram of the firing mech.
the internet
Gun Broker, Auction Arms, American Arms
On the but
Try e-gunparts.com
No public records
Try e-gunparts.com. Cost will exceed the value of the weapon.
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
Auction sites, Shotgun News, gun shows, gun shops
Riverside Arms Chicopee Falls Massus. (569HF
Try e-gunparts.com
it is a Stevens, parts are interchangeable...