If you're getting a tattoo, especially as an expression of your individuality, why would you want a tattoo just like someone else's?
Instead, find other pictures of what you're looking for and have your artist draw up a custom design for you. Example: If you want a tattoo of a penguin standing on a glacier, find real photos of penguins and glaciers. If you want a tattoo of a blue rose wrapped around a cross, find pictures of real roses and crosses that you like. If the pictures don't show exactly what you want, just take them to your artist to use them as guidelines and tell them what changes you want to be made to the original pictures. A real artist will welcome the challenge of a custom piece.