[sdiy] blue copper-clad circuit boards?

[denshi]

ive seen them in products, but cant find them anywhere
for sale.  does anyone know where i can get ahold of
some un-etched copper clad circuit boards that are
blue and about 4"x6" or bigger?  i want to etch some
custom boards, and i like the look of the blue. 
thanks all!

seth

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