If you still have not found the design element you are looking for, instead of searching for its digitized version on the Internet, get it a lot faster by drawing it yourself. Just type your keyword combination (animals, heraldry, coat of arms...) into the browser, find an image of an old coat of arms that contains the desired animal design, import the image into 2D CAD or vector program and trace its outlines. This is most likely a faster solution, because you will definitely be more efficient by drawing the desired design element in the way you want, plus the old illustration will probably contain an animal design that suits you better, due to the fact that on the Internet there is a far better choice of raster Illustrations than vector illustrations containing coats of arms.