I totally get your fascination with rare anthuriums; they’re like living art! When it comes to reputable sources, I've had good experiences with specialized online plant nurseries and Etsy shops where sellers have solid reviews. Joining plant groups on social media can also be useful for finding trusted recommendations and even getting in on some plant trades.
As for species that thrive indoors, I'd suggest looking into Anthurium clarinervium or Anthurium crystallinum. They both have that striking foliage and can do well indoors if you manage their humidity levels and offer bright, indirect light. I've also found that using a chunky, well-draining soil mix really helps prevent root rot—a common issue with these beauties. Adding a layer of sphagnum moss on top can boost humidity if needed. Happy growing and hope your collection flourishes!