The Bali cat sharks are an option too. Hard to find. I’ve seen them mislabeled on LA DD and a friend important a bunch onto Canada so it is doable. Also the Halmahera epaulettes. Having worked with them, they are timid,and reclusive when compared to the PNG, speckled and common epaulettes. Smaller and thinner too. I had trouble putting any weight on these guys. Excellent for a smaller system because unlike the cat sharks they typically don’t swim and instead crawl. Plus they are tidepool sharks and used to tight spaces. ORA has a handful of adults but I think they have been unsuccessful, as have I , with breeding them.