I wasn't able to see your gasket, but I recently did a simular job. I scaned half the gasket on a flat bed scanner and imported that image into my CAD program. I then traced it, and mirrored the image. (the flange was symetric and my scanner wasn't big enough) It took a couple of trys cutting samples, using my CNC mill to get the proper fit, but it worked out pretty well. I used some scrap 1/4" laminate flooring for the sample parts and test fit them on the engine before sending the file to the laser cutter. I did use measurements for bolt hole locations, but for outside contours and ports the scanned image worked out good.