Try e-gunparts.com, gun shops, gun shows, want ads.
50-100
Numrich Arms is a good source for gun parts.
YOu need the services of a gunsmith
Not much, $100 to $120.
50-150
Best to ask a gunmsith for assistance
No public sn data available
the western auto model 120 was made by marlin.The marlin model 99 was made between 1959-1960.
50-100 USD
i belive that people should always ansewer this question
Reliable and solid performer
@ 30-100 years old.