If you're talking about my remote, it's a Grayhill joystick+button+optical encoder all in one axis.. it has all 7 Empeg actions in one device, which I'm going to stick in the place formerly occupied by my cigarette lighter. The joystick itself is > $60 though, you could just as easily use 4 buttons and an encoder or 7 buttons and arrange them to look like your an Empeg front panel. It would actually be simpler, almost everything on my board besides the power regulator and basic stamp is to convert the joystick interface to 7 digital bits.

My Empeg and sled will eventually be put in the trunk with the sled, and the display/control in the front will be connected with just a regular 9-pin serial cable.

I'm about to leave for 2 weeks, but when I get back I'm going to be installing the stuff in my car and working on the software issues.