Maybe I'm totally off here, but this thread got me thinking. Technology has come a little ways since the Empegs and even the remote display adapters were designed. Looking at this in 2012, could you build a similar remote display with something like an Arduino?
Given that you can control the Empeg over ethernet, and there seem to be Arduino programs to access web pages, and programs to drive display screens, could you throw a few together and make a network based display extender? You wouldn't get the animations or anything like that, but anything that's accessible over the web page might work.

I have absolutely no experience with Arduinos, and don't need a remote display (I took off my facia and knobs and hid my Empeg behind some plexiglas and just use the remote) but the idea came to mind so I thought I'd put it out there.