You'll need the reflector and bulb, other than that you are done. PFO is one of the best ballasts out there and this is a dual one (I have the same one) so you can have 2 lights with a single ballast.
I may take this off your hands if we can come to an understanding on a price. I don't really need one, but it might be a good idea to have one for *just in case*.
Where are you located at? I'm in Salisbury.