Welcome to the BBS. I have a '99 Mustang and the best faceplate match for your dash is going to be either the clear or "smoke" colored faceplates from Darkstorm, who is a regular poster on this BBS. These plates are not from Empeg, but they're perfect replicas. I think he wants 25 bones for them.
Here's a thread with some info. Steve should be able to point you to some pictures, or there might be some floating around the BBS. If you're curious about the color, just take the faceplate off your Empeg and you've got the color. :)
See, the reason clear or "smoke" tinted faceplates are the best is that the VFD screen actually has a natural green tint to it. The green faceplates yield a very deep, rich green color that won't match anything. I wouldn't say the natural green of the VFD is a *perfect* match for my dash, but it's closer than any of the other plates available, and because it's not blocking as much of the light, it's the brightest faceplate available. I am very happy with mine, and no, DarkStorm isn't giving me a commission. :)
Good to see another 'Stang driver in the crowd. You'll have to show us some install porn when it's all done.