Okay, attached is my latest stab at an Anna VU visual replacement.

For those that wish to try it, upload it to the player as vuback.raw into /empeg/lib/visuals as instructed here.

The 0db point is about (as close as I could get it with low-rez pixels) at 64 degrees from the left end of the scale. The right end of the scale is labeled as +3, and the left end of the scale is numbered approximately what Tim suggested.

I think that it is not possible to get it perfectly accurate to the real world, and this is about as close as we're ever going to get it.