Try taking a photo of whatever flag you wish.Save it in a computer as a picture.Open the drawing program integral with your operating system.Transfer the picture to the program. Adjust the drawing to scale. Capture it and reverse. Abut the two and print the result on the thinnest paper you can manage. Fold over a rigging line, glue with white glue.Trim the result and apply. It can be folded and draped to get a good optical result. Been doing this successfully for years.Perhaps not the greatest solution,but with some practice you might get satisfactory results.