Depending on where you are in the world, this may be an expensive shark to import. For us here in the U.S., the Horn Shark might be an acceptable substitute. I know we used get Horn Shark Eggs and hatched them out. Kind of exciting when you look at that egg case in an empty tank for a while then BAM!!! a little shark appears.
(I'm not sure if shark eggs are still legal to collect tho
FYI: You do need to be careful with what you mix with these types of sharks. Since they are not constant swimmers, they can get nipped on by grazing fish types.