Are the 5050 leds and the 2020 the same foot print? From the original poster I thought the 2020 was much smaller, but the data sheets of the two seem to be the same except the 2020s seem to have internal pads (a heatsink in one case and it appears power and ground in your case). To be really useful your outline would need to be turned in to an svg file (relatively easy to do) so it can be made as a part.
Peter