Chill, dude.
The point is that nothing is impossible in BC, only not done yet. Some things are hardcoded, sure, but there have been a few ways shown around that, and by comparison, designing and building some ships is childsplay (Not to mention a completely separate discipline).
Anyway, aside from the ships you mentioned, there's another JJcelsior, by Baz, as well as the one by Wiley, There's baz's Kelvin refit, there's a Kelvinbash Miranda by Wiley, and somebody was making a constelljjtion class too.
My eyesight is 20/20, and I think that constitutes "several".