What aspects of these are the most important to you? I'd be more than happy to help you search, but some 'must have/could live without' criteria would narrow it a bit more.
Have you checked Lynnie's recent post about similar booties? Everyone rounded up lots of options there, and it's a pretty similar style to the one's you're looking for ...
__________________
To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment ~ {Ralph Waldo Emerson}