check out this thread for all the bulb numbers. http://www.mazda3forums.com/index.php?topic=59597.0
There are tons of places to buy the bulbs, but DaBears2k.com (a forum sponsor) sells a full kit of LED bulbs at a good price. You'd have to pick and choose the bulbs you need through other vendors. They're available in white, blue, or red.
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