Walking into a store and finding a lefty holster may be difficult, but I think everybody that makes holsters makes them for lefty's.
I don't know if Mitch Rosen makes the Upper Limit for revolvers, but it seems like a natural for small revolvers https://mitchrosen.com
Lobo Gun Leather is popular among the S&W revolver guys https://lobogunleather.com
Kramer https://www.kramerleather.com