Bit of a niche one here - but if your surname is MacLeod it might be just what you're looking for!
Both created with The GIMP, using a tiled tartan pattern, rotated by 20 degrees, a canvas texture to give it the appearance of textile. The crest is cut from a photograph of a 5cm badge I have on a guitar strap. It is given the appearance of being embedde into the taran by bumpmapping the tartan layer. If anyone wants a copy of the multi-layered GIMP file, just leave a message here.