Homebrew PCBs

Hello all,
  I would like to make my own uv exposure box, but I am having some 
trouble locating a suitable tube. Could anyone tell me if replacement 
aquariam uv tubes would work (do they opperate at a different 
wavlength), also can you use disco uv tubes?

If anyone knows of a supplier in the uk other than maplin I would 
appreciate it (RS do sell them but they are very expensive, maplin 
are out of stock)

Thanks for your help