Here's my list of good sponsors with Granny sites:
Octopus Cash - Impish Grandma
SPACash V2.0 - Granny Does Porn, Ask Your Granny
Flash Cash - Lovely Grannies(New!), Granny Fucking
Niched Sites - Blacks On Grannies
Silver Cash - Hot Nude Granny
K Cash - Grannys Hardcore