1974 Duster 360 with sunroof production numbers

Hello all, I have a fairly high optioned 74 Duster 360 automatic, most options without air, but with a factory sunroof. I was wondering if anyone has a way to get the production numbers for sunroof cars and other options. I've tried contacting Galen Govier years ago, followed up a number of times with no response, and it appears the current contact and website are under construction. Any info or suggestions would be appreciated. Thank you.