There's not much available at the local fish shop. I might be able to special order something later.
I was thinking about just java moss for now. Maybe some anubias to attach to the driftwood. I think that it would be nice to have something taller for the back like a crypt. Other than that, I can't really think of anything. They have Bacopa, Vallisnera, Hygrophila Corymbosa, and Madagascar Lace. I don't know if any of those would be appropriate for a low light pico tank.