Where can I get posters of really hot mermaids?

I am redo-ing my room in a mermaid theme (NO RUDE COMMENTS PLEASE!!!) and i just purchased a $50 bedset and only have like 20 bucks left of my birthday money. I need a place where I can find CHEAP posters of really HOT mermaids, that are not ariel from the little mermaid movie and tv show. Thanks and your support is greatly appreciated