I need help finding a design for my mothers tombstone?

my mother recently died and i wanted to have this design of an guardian angel who is standing behind two small children as they cross a bridge. famous picture. but the design that the tomb stone place has of this image has very little detail. they said if i can find another image of this design that i want that has more detail they would be able to use it. if anyone knows of any web site that has deigns i can browse through please let me know. we are having the design carved in and not eched it if that helps. thank you so much, scotty