Since you did not provide the serial number, you can check the Browning web site (has serial number information on it). Also, the Blue Book of Gun Values has serial number information on Browning's.
Call Browning.
1994. You will have to call Browning to find out the model
Take the rifle to a gun shop so they can figure out what make, model and caliber rifle you have. There is no 84 caliber long rifle.
The Sears Model 42DL .22 caliber rifle was manufactured by Marlin Firearms, their Model 80. Check with Marlin for parts availability.
Professional appraisal
Basically impossible to do with just the serial number.
Where can I find part for a Marlin model 57 rifle .22 mag
That model is obsolete, but we have a good selection of parts. sales@countrygunsmith.net
Winchester model 100 (rifle) in 100% shape is worth $550.00 in the 308 caliber. Winchester model 100 (carbine) in 100% shape is worth $795.00 in 308 caliber. If you find a model 100 in the 284 caliber consider yourself lucky and buy it, dinosaur bones are easier to find.
Have you tried a google search?
webdept@gunpartscorp.com
Marlin Firearms Co.