Here's my list:
SPACash V2.0 - Granny Does Porn, Ask Your Granny
Octopus Cash - Granny Rate, Impish Grandma
Flash Cash - Lovely Grannies, Granny Fucking
Fame Dollars - Granny Ghetto
Niched Sites - Blacks On Grannies
Silver Cash - Hot Nude Granny
Fetish Hits - Grannies Fucked, Granny Ultra
I haven't checked all these sites for real granny content, will do this little later and get back to you...