Randy welcome to the site and nice boat! The CVX20 is an iconic design and one of the more sought after Carlsons.
A good place to start researching your boat is by looking through the marketing literature posted online. It gives you hull specifications and you can see what options, colors, etc., where offered on your boat as well as what years it was made. Don't treat everything as gospel but they are for the most part pretty accurate. Click on the "Carlson Factory Images" bar/button.
http://www.cgoamn.com/40.htmlYou can't buy parts or things like owners manuals from Glastron anymore. Many parts are obtained from donor boats although some things like your windscreen can be bought from companies that make reproductions. There is a resource list on the site that you can look through to see what your options are.
There is also the Classic Glastron Owners Association national site that you can use as a resource.
http://www.classicglastron.comHope that helps.
Kip
I see Scott already got you taken care of with a manual!
