I think it might have been me who posted about getting a suckerbelly...
I just happened upon them while I was traveling. Try searching under some of the other names given. Google searching for butterfly loach brings up a lot of sites with information. When I bought mine, the store called it a Chinese Butterfly Loach. I had to do a lot of searching to find ANY information on them. I bought mine from the Aquatic Critter in Nashville, TN. I'm not sure if they will ship fish.... I've never asked. I saw them on
www.aquariumstuffers.com for $3-4, but I have never ordered anything from them, so I don't know if they would be trustworthy or not. I think I also saw that sometimes they are called a Hong Kong Pleco. Good luck!