I built a magic eye VU using parts from a Foreplay 1 power supply a while back. It was very simple, and worked pretty well.
The hardest thing was the socket for the magic eye, but that really wasn't too hard to find.
I've taken it part because I need the parts. I'm pretty sure a have the schematic of what I built.
If I can find the schematic, I'll post it.
The circuit came out of a RCA manual, and think I only had to change a resistor value to tweak it.