Congratulations and welcome to Sailnet.
My first boat was a 1972 Venture 2-22 and I bought it as a project boat. The winch is sold by Northern Tool. I replaced mine with the one found here
and it worked perfectly. It wasn't too expensive.
I made a new rudder out of mahogany using the old rudder as a template. Sure the mahogany was overkill, but once varnished it added a nice touch to an otherwise no-frills boat. You can buy a light-weight factory made rudder, too, as has been mentioned.