you can use any electronic ballast thats designed to handle the amount of watts you want..
there are wiring diagams and a ballasts selection wizard on fulhams website (the maker of he WH seires of ballasts)
If you look at the specs of the work horse ballast suggested by there site it will give you an idea what ballast or ballasts you will need.
off hand I would suggest a 4-F32T8 and a 2-F32T8 for standard electronic ballasts or a work horse 7 but not using all of its power leads.. wich ever is cheapest..
If you need more detailed help with your project you can click the email button under my post, I dont subsribe to threads (look at my post count, My inbox would be dead
) But I do answer PM's and e-mails even if Im not actively posting here on the board.
Id be happy to help