Didn't find an alien cookie cutter, so I made one. This is the first Thing I'm putting up here, made this with PTC Creo Elements Direct Modeling Express. Also included the .pk2 file, so you can change dimensions. I tried to keep some holes on the top, to be able to push down the sticking dough. Didn't need it though. I think it looks even better if you leave the eyes and mouth, check the picture.You can scale it, but keep in mind, that it will not be stable anymore if the perimeters get to small, especially if printed in PLA. It will break. If you can't handle PTC Creo Elements Direct Modeling Express and need different dimensions, just text me.