Which model??
I have a Marlin Firearms Co. 12 gage, bolt action shotgun.
I believe it was a Marlin model 49. I had one of these myself in the 60's. If you are trying to find replacement parts, then you can use the Marlin parts as is. That is what I did, parts for Marlin are easier to find and sometimes cheaper.
The Sears Model 42DL .22 caliber rifle was manufactured by Marlin Firearms, their Model 80. Check with Marlin for parts availability.
Numrich Gun Parts Corp.should be able to help you.
Try contacting Marlin parts. Consumer Parts Orders: Consumer Service Dept: (800)544-8892
Try e-gunparts.com and Marlin
I would first look at numrich gun parts.
you can find them here... http://www.e-gunparts.com/productschem.asp?chrMasterModel=082Zz778
Numrich gun parts corp.They may be found on the web.
Marlin Customer Service, or the website for gunpartscorp.
Numrich gun parts corp.They may be found on the web.