http://www.greglake.com/newsite/gallery%5Ct%205-6-2%20markLglstage%2072.jpg
The bass looks like it was modified (three knobs and a bigger scratchplate and the treble PU cover is closer to the bridge). There's a bigger pic of it here:
http://www.greglake.com/museum/
Click "The Global Collection" and the pic is on a third page of thumbnails, second row from up and in the middle!
Maybe he tried to make it more like his Jazz Bass?