While it is not niche specific, Randy Blue has all of those. You can even tailor your links to a specific niche page on the site to sell only to those who like Asians etc.
http://www.blueloot.com
http://www.randyblue.com
http://www.randyblue.com/models.php?niche=Black
http://www.randyblue.com/models.php?niche=Asian