Just an update:
The PetLife (formerly The Kennel Store) just over the bridge in SoPo has a small selection of fish, but they tend to have different stuff from other stores in the area. Stuff like Kuhli Loaches and rarer tetras, and some interesting cichlids. Excellent prices on livestock too. Can't attest to health, but everything looked fine, no overstocked tanks, and a pair of Kribs had free-swimming fry in one of the tanks. Worth a look if you're shopping for fish locally...