I haven't tried Tops yet since the location next to Bed and bath was demolished but I've been to all the other Falang stores I know in Pattaya. (Friendship, Villa, Food Mart, Foodland) Macro used to have a large stock of the tomato soup and I was confident I'd find it there when I shopped Macro today.
While the Campbell soup was in the same place I remember it being a few years ago there was nary a can of tomato soup to be found.