As far as I know, there aren’t a lot (or any?) of oustalets breeders. Wild-caughts are probably your only option. So, just have a good quarantine setup ready to go before hand. For what it’s worth I have found that a good quarantine setup should be super easy to take apart and thoroughly clean. I can’t stress this enough: cracks, crevices, and corners make eliminating something like Coccidia a nightmare. I don’t know whether you’re a seasoned keeper, or new to the hobby, but if you’d like some pics of my quarantine setup—which worked beautifully—let me know.