I would go to Numrich Gun Parts Corp.
Numrich gun parts
I would seriously start my search at numrich gun parts corp.your gun is a model 60 glenfield that was made for montgomery wards by marlin/glenfield.
We have virtually all the parts for most Marlin models. sales@countrygunsmith.net
Marlin Customer Service, or the website for gunpartscorp.
straight from marlin
value marlin glenfield model 60 22 simi auto rifle
50-100
It is the exact same rifle as the Glenfield Model 30A, and yes parts are the same as the Marlin 336. Forearm is the cap style.
http://www.rimfirecentral.com/forums/forumdisplay.php?f=20 helps if you tell us your Model Number.
No sn data published.
$100
With the serial number that you have provided,your Glenfield model 60 rifle was made in the year 1976.