The most southern place for smelt I know of would be BIP but that's more west than south. Other that, AJ's.
The fella off ex2 on 89 in concord has shiners, all sizes, and suckers fr cut bait. Also spikes, and meals.
The trouble with finding a live smelt dealer is that they're notoriously difficult to keep living.
Anyone that has bought them the day before and planned on using them the next can attest to that. They're extremely sensitive to any environmental changes.
Good luck!