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I use Rockler, good selection and a price savvy option. Check out their veneers, for 1/8 look for "by the piece" products. Frankly, at a dollar and a half per set I can't really see a need for using...

Take a gander at this plethora of info right here.
It will answer all of your questions, and there's even videos to explain parts :)

Best of luck.