If you are fortunate enough to have a Woodcraft store in your area they
should have a variety of metric forstner bits, even though it might be a
bit limited. Or you can simply find an online supplier -- a search for
"metric forstner" in Google (without the quotes of course) turns up
dozens of suppliers. But I can heartily second Paul Franklin's
recommendation of Lee Valley -- they are a great source for almost
anything in the way of woodworking tools.
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