Join Date: Oct 2010
Location: Victoria, Australia
Looking at the OP, I think she (I'm assuming female) is in Sydney which I am going to make the obvious conclusion and guess is Sydney, Australia.
We don't have Petsmart/Petco here and just realised depending on where she is, pencilfish may or may not even be available.
Stores I can think of in/near Sydney that may sell them are Aquaristic and Auburn Aquarium. They seem to get in some more unusual species of fish.