I have the same problem- For something as "common" as dwarf hair grass it is impossible to find.
Neither Petsmart near me has it. Superpetz doesn't have it- LFS doesn't have it.
Really hard getting variety of plants here unless I ship them in... I might see what's around when I go to Atlanta next month to see in-laws... I imagine there has to be some big Aquatic stores there.
their shipping is ridiculous, im try aquabid.