Might want to try
Over Bucks they have the most granny sites.
I've never seen a granny site dedicated to black/ebony grannies.
Here's a list of every granny site...
http://whopaidme.com/niche/granny/
You might want to take a look at those sponsors and see if any offer some black grannies.
20 Best Granny Sites
averaged from all review sites
#1 Amazing Grannies from Zeta Cash
(mature - granny) (Rating: 3.8 / 5 with 1 Review)
#2 Granny Channel from Mature Money
(mature - granny) (Rating: 3.5 / 5 with 3 Reviews)
#3 Lusty Grandmas from 21 Sextury Cash
(mature - granny) (Rating: 3.5 / 5 with 20 Reviews)
#4 Hot 60 Plus from Incredible Dollars
(mature - granny) (Rating: 3.4 / 5 with 4 Reviews)
#5 British Granny Porn from British XXX Cash
(mature - granny - british & uk) (Rating: 3.4 / 5 with 2 Reviews)
#6 Granny Funs from Over Bucks
(mature - granny) (Rating: 3.4 / 5 with 5 Reviews)
#7 Granny Pokers from High Def Riches
(mature - granny - high def) (Rating: 3.3 / 5 with 6 Reviews)
#8 Excited Wives from Excited Wives
(mature - granny) (Rating: 3.3 / 5 with 4 Reviews)
#9 Granny Gummers from Adult Profit Network
(mature - granny) (Rating: 3.2 / 5 with 7 Reviews)
#10 Plumpest Grannies from Over Bucks
(mature - granny - bbw) (Rating: 3.2 / 5 with 4 Reviews)
#11 Granny Gone Bad from Reward Them
(mature - granny) (Rating: 3.1 / 5 with 5 Reviews)
#12 Young Dick Old Chick from Over Bucks
(mature - granny) (Rating: 3.1 / 5 with 2 Reviews)
#13 Grandmas Hunters from Over Bucks
(mature - granny) (Rating: 3.1 / 5 with 3 Reviews)
#14 Granny Riders from Over Bucks
(mature - granny) (Rating: 3.1 / 5 with 5 Reviews)
#15 Her Last Fuck from Royal Vault
(mature - granny) (Rating: 3.0 / 5 with 12 Reviews)
#16 Granny Can from Yak Bucks
(mature - granny) (Rating: 3.0 / 5 with 1 Review)
#17 The Granny Porn from Over Bucks
(mature - granny) (Rating: 3.0 / 5 with 4 Reviews)
#18 Nana Funk from Join Right Now
(mature - granny) (Rating: 2.9 / 5 with 6 Reviews)
#19 Horny and Old from Pimp Profits
(mature - granny) (Rating: 2.9 / 5 with 2 Reviews)
#20 9 Buck Grannies from Spa Cash
(mature - granny) (Rating: 2.9 / 5 with 2 Reviews)
Source: Highest Rated Granny Sites @ WhoPaidMe
mike
__________________
WhoPaidMe - Cheque names, ePassporte IDs, Alexa data, combined review scores, new site launches & promos, for every sponsor and every niche!