Hi Titanicman,
Yes, as Jason alluded to, if you ever have the misfortune to see the film "Britannic", please don't see its sinking sequences as being historically accurate. In fact it's been many, many years since I sat through it but I seem to remember that only the last few minutes of the film were actually devoted to the sinking itself.
Other than that, i'm not aware of any either. As with many sinkings it's down to paintings, witness testimony and the rest is using the imagination!
Cheers,
Adam.