Well, here's the funny thing: they went to the trouble to make a decal for U.S.S. CONSTELLATION, so if they did that, why not make new NCC decals, too?
So... What decal names came with that original ATM kit? Just the Enterprise
I believe ATM kit only had the Enterprise decal at first when it went on sale. Sometime later, after the series was no longer being film. They added other Constitution ships decal in the ATM kit as well.