Noone is currently working on one, as far as I am aware. There was a model by ragingloli floating around (the same guy who did the Hatshepsut, and whose work is the foundation for the new Colossus), but it was completely unusable for conversion.
That said, there are only very few dos and don'ts for making new models for retail ships. The most important thing is that any highly recognizable shapes are preserved; the overall silhouette must remain the same. Similarly, the overall color scheme should not change, unless there are very compelling reasons to do so (for example, the MVP Fenris and Leviathan models have differing glow colours; this is a useful visual hint to players, and so a departure from the original color scheme was warranted).
Furthermore, subsystems must remain in the same places they were in retail.
You have free reign to do whatever you want to do within those constraints (And, of course, the realities of making game assets; Sure, your million polygon, 8192^2 textured navbuouy may look mindblowingly awesome, but it's not a good idea to use it ingame).