Jessops sell background Rolls - check their Website.
Rolls of white Lining Paper from a DIY shed
Use your imagination and create something.
Cheaper in the long run and gives a great feeling of satisfaction when achieved.
A lady I know wanted a new photo of herself for a passport.
She toured the PhotoMe booths and got -for her - indifferent results.
She was relating this problem over lunch in a country pub on a country walk.
I took her out side stood her against the white washed wall of the Gents and snapped her with my digi cam - that's the one she used. ;-}