I also like wet spot's fish offerings. But be careful because they have a 50$ shipping fee, which is kind of sticker shockery. I think that's the general rule for online retailers though, shipping fees tend to be on the high spectrum.
You could also try msjinkzd , aka Rachel O'Leary. I haven't had the chance to order from her yet (but one day!), but she's a pretty nice person and has excellent knowledge on many nano fish.
When you say that there are not many options for fish stores, is it that you're surrounded by petcos/petsmarts? Or is it that the fish stores are rather far away? As an example, I'm currently in Arkansas, so I have to drive an hour to get to the good LFS, and they do custom orders, especially if you've built up a reputation with them. I was able to ask mine to get me in some fish during this pandemic, and then pick them up the next week.
So many fish/plants/inverts to keep, not enough aquaria.