Does not exist. The 742 is a semi-auto.
The 742 is a 740 semi auto with the feeding problems fixed. Made from mid 1950's until it was replaced with the 7400.
I'd try Numrich at e-gunparts.com first.
First lets state that your rifle is a Remington model 742 Woodmaster semi-auto 30-06 rifle ,not a Winchester.these rifles normally sell in the range of 275-350 dollars depending on overall condition and a good bore.
It's probably best to ask a expert.
First, get a copy of the owner's manual. If it was made by Browning, go to Browning.com and request one. Second, follow the instructions.
Your remington model 742 rifle is valued at between 275-350 dollars.
You can request a manual from the company.
An autoloading centerfire rifle made from 1960-1980
Best to ask a gunsmith for assistance.
A model 742 magazine
Ask a gunsmith for help