You might try Numrich Gun Parts Corp.If they have parts,then they may have a schematic for the firearm in question.
www.urban-armory.com
www.savageshooters.com
need help to find schematic for a Winchester model 61
where can i find a clip for a 22 cal springfield model 56
You can find it on e-gunparts.com
Numrich may have them. e-gunparts.com Item # 121950
Egunparts has some.
Try e-gunparts.com
lalalalalalala
It is a Stevens 940B. I have the schematic. sales@countrygunsmith.net
Contact Remington or try e-gunparts.com
You will have to provide the name of who made it and what model for anyone to be able to begin to help.