This may sound equally dumb, but is there a definitive source for the official measurements?
Gary Kerr took physical measurements of the model and translated them into a set of plans back in 2005. I thought that a lot of that information was publicly available, but I don't seem to find any place that has it so I might be wrong about that. Kerr tends to not share a lot of this stuff openly, and if he doesn't want this in the public domain, then it most likely isn't.
Using the information I have I cross checked these plans
against the measurements of the studio model, and they seem spot on. So these would be a better alternative to any other plans of the TMP Enterprise (if the actual studio model is what you want to use as a foundation).