I will laser engrave anyone's Epsilon backplate. Just send me your plate, and email me a high resolution drawing in black and white. The file I used was 1800x1800 bitmap.
FYI, the textured portion of mine was the black, and the shiny (bare) part is white. If you want the reverse effect, simply invert your colors.
Edit: Also, due to the location of the USB cutout on the plate, this copper side in on the inside of the "case," under the PCB. If you want the copper side out, you'll have to cut out a new USB hole opposite.