Sears Model 126.19300 is a Crosman model 140/1400. Crosman no longer repairs this model. Go to http://www.crosman.com/airguns/service/repair and put in your model number and it will help you find a repair shop near you.
The Marlin model 38 was a pump action .22cal rifle made from 1920-1930.If there are any parts available it would be at Numrich arms Corp.They can be found on the web.
Try e-gunparts.com
Parts for a Stevens Model 87A can be found at: http://www.e-gunparts.com/productschem.asp?chrMasterModel=089Zz87A
We have them. gunshop@nctv.com
Numrich gun parts corp.They may be found on the web.
Your best chance at finding parts for this .22cal single shot is Numrich gun parts corp.They may be found on the web.
website for gunpartscorp, letter S, Savage, Model 73, and there is a parts diagram.
Try Numrich Gun Parts Corp.They may be found on the web.
We have plenty of parts available for that model. sales@countrygunsmith.net
As of 2014, there are a few places where one can get parts for a Stevens visible loading repeater 22 caliber model 70 gun. These parts can be purchased through the manufacturer, local gun dealers, gun auctions, and gun classifieds.
If the letters HS are on the grips, this is probably a Herbert Schmidt- a low cost handgun made in (what was) West Germany. I believe these have not been imported to the US in some time, and parts will be scarce. Check with a gunsmith- some parts such as pins or springs can be made- gunpartscorp.com MAY have some parts available- but the cost of parts MAY exceed the value of the gun. Sorry-
E-gunparts.com http://www.e-gunparts.com/productschem.asp?chrMasterModel=082Zz81