Is there an external microphone I can use with the ipad when taking video

I have staff that are using the ipad to create and upload interviews taken in busy/noisy places (They are using it instead of a video camera becuase they always have it with them). If there was a way to use a lapel microphone it would improve the sound quality, but even a plug in external microphone would do. I considered using a set of headphones deisgned for the iphone and cutting of the ear plugs but I'm not sure if that would work either.

Apple Earphones with Remote and Mic

Apple Earphones with Remote and Mic

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