Dainty stitches has one for one dollar, there might be more on her site, and liane has one. Go to free designs, then down on the left to butterflies, it's near the bottom. I know I have come across more, but I am hard at work! lol
Jo
designs by sick has them
emblibrary has some...and some are 3d..I have them and they are just beautiful.. they are not free but well worth the money as they sew out perfect!