Damn F-list

Now I can't help but think of options for an entirely DW casted version of Rocky Horror. Help?

New Who
Frank N. Furter: Master
Brad: Ten
Janet: Rose
Magenta: Donna
Columbia: (no clue)
Riff Raff: (no clue YOUR JOB, FIGURE OUT)
Rocky: Jack
Eddie: Nine

OLD WHO
Frank: FOUR, LOLOLOL
Brad: The Brig, to be all horrified and stuff
Janet: Mel
Magenta: Romana
Riff Raff: Master
Columbia: Tegan
Eddie: *shrug*
Rocky: ...I dunno. The only pretty blond I can think of is Five, but that's REALLY gross. 


IDEAS?