remove fisheye distortion

I need to remove the fisheye distortion caused by an HD camera.

I see Final Cut Express has a fisheye filter, but I think that's for adding rather than subtracting fisheye distortion.

Is there a simple fisheye removal tool available? I guess it doesn't have to be specific to Final Cut Express, but that would be my preference.

I'm running Final Cut Express version 4.0.1

Thanks!

W.