I am a new GM, and need to write up a number of character sheets for NPCs, for my campaign in Doctor Who- Adventures in Time and Space. I would much prefer to do this by typing into the PDF of the sheets, but the official ones I have from DriveThruRPG are read-only. I'd also like to be able to do this for my players' character sheets eventually, to keep things tidy.
Does anyone know of an editable version? I don't mind if it is the 10th or 11th Doctor edition, the difference is only cosmetic.