I know what you mean, I think the interracial cuckold fetish is a sub niche of cuckolding itself. 
By the way "normal" women are not cut out for cuckolding thats why there are so few real life cuckoldresses
As far as real life interracial cuckoldresses go my permisteral favorite based on my own criteria as a cuckold would be none other than this Goddess!
I guess with her its either you love her or hate her! 
One thing I guarantee as a cuckold and fan of cuckold material is that there truly is no other quite like Sara. The total package
sexy,slutty,natural,amateur,voluptuous, mouthy,trashy,divine!
she has convinced me that she is totally into her Ir cuckolding lifestyle...
The hyperlink is visible to registered members only!I am in love with Sara Swirls!
htttp://saraswirls.com/main.html