That's what I had when I mentioned the pioneer units - check out http://www.pioneer.co.jp/car/pclink/, then go to download, then level meters - you can preview some of the ones available.

As an addition to this (just to give it the icing on the cake, as it were) it would be nice to be able to have a static image layered behind the animated images (which would need to support transparency, of course) so that features such as a L and an R could be displayed (using a single image drawn twice on each side of the screen allows for no differences in the left and right sides of the meters)

Cheers,

A.