You can find good plants at uncle neds but they dont take care of them too well so they are just scattered around the storin tanks. Ive bought them and they have recovered in mytank.
Tropical isle can have a good selection. But it is a pain having them on the foor and they ae expensive and rude.
Lovely pets has a basic selection of plants nothing specisl.
I think uniqe aquaria was the old siptons in boston and they moved. From what know they are mainly salt water and reptiles. I think thy are prob gonna habe a small fresh water sectionbut I would call them anway to check.