They sell them at the Argyle fish and chips shop in Kearney. I have no idea how much they cost. There is also a fish and chips shop in Pt. Pleasant called Stewarts but I'm not sure if they would have the Aero bars. Good luck.
I saw them at Whole foods in Marlton yesterday. I think they had two types. I was actually looking for flake when I saw the european candy. It was purely by accident that I found the section since the store is a mess due to expansion construction.