An adapter that will fit the original Melzi board footprint used in the Duplicator I3 and has mounting holes offset to mount a RAMPS 1.4 / Arduino Mega board if you feel the urge to upgrade your printer. The RAMPS board has to mount very close to the edge of the enclosure so I offset the board and put the power connectors and the USB towards the back where the power supply and harness wires would be.
Use at your own risk. I made a similar board for myself that adapts a RADDS board so the main footprint works and the mega footprint is correct. You can see from the renderings how it looks.
You will need to print the STL at 45 degrees to fit on a 200x200 bed. The file may already be rotated (I imported into S3D and rotated then saved again). Print at .2 or .25mm layers with 4 or 5 top and bottom layers and at least 15-20% infill / 2 Perimeters.
I am making a separate fan shroud to redirect the power supply fan output directly out the side of the controller to help keep hot air from circulating over the board.