Mine two don't keep together. FWIW. They are in a 240 gal with a bunch of diverse tank mates. Perhaps it's just as they say - 2 is not a good number when it comes to fish that are gregarious but hierarchical too.
Discusorigins is not far and Mark has had unusual stock lately. You have guys who raise sturgeons from fertilized eggs. Lots of fish farms in your area, you know of course, that supply most of the east coast and a huge chunk of the US altogether... but they don't deal with retail usually, that's true.
There are 2-3 stores in Tampa area that I used to like visiting.