http://www.dexterblog.com/
This was done on a Catalyst framework by my designer. She does both mainstream and adult designs, is in the USA and her rates are affordable.
Header sample above for one of my WP blogs
If you wish to get in touch w/ her, send me an email at trashyg ( at ) ymail ( dotcom )
(that's ymail not gmail) and I'll pass along her email addy.