Well, I think (but know for sure) that Mastercom has gone the way of the dinosaur. But that doesn't mean you can't still find their work. Theit are to my knowledge three books by them. Twoyou have obviously and one more called "Starfleet Prototype". Now ALL of these volumes are long out of print and rare. I would would recommend eBay as a starting point for your search. It may take some time, but keep checking and a copy is bound to appear.
And as far as the "Constitution II", I scour model sites and this forum pretty regualrly looking for ships like this, 'cause I'm a Connie junkie. I love all these variants. I have never found this particular version. If you and I are on the same page, we would be thinking of putting out a request for this beauty.
Modelers like WillardDcker, P81 and WickedZombie are real masters at capturing the lines of these ships. I myself have recently asked if someone would like to model the U.S.S. America seen in the "Ships of the Star Fleet Volume One". It is the one with the bigger impulse deck like the Connie II but also has a rear torpedo tube, wider support nacelles, etc.
I'd love to see the Connie II make are game debut.