If you go to that area, AG and AA are only 10-15 min from each other.
From AG -
go right out of the parking lot,
take the right at the light then drive 10 min to I-93S,
get off at the next exit #2,
take a right at the light, then a right at the next light.
Look for AA on the right after DD and in the same parking lot as a gas station and a dive shop.
I always hit both stores when I'm up there.