The following are some images that I've taken from various places and tidied up to use with a laser cutter. The image types may vary between bitmaps, jpgs and svg vector files depending on how I edited them at the time. In some cases there will be both "negative" and "positive" images, depending on how your cutter and software might operate. Where there are images shown below they are the small versions (right click to save them), but clicking on the image will bring up the full-sized image. Given the precision of laser cutters the larger version may give you a better quality image, but also take vastly more time...
Use these as you will, no warranty of any kind...