I'm assuming you mean Botia (or whatever it's called now..) Striata? They can be a bit awkward to find, see if your lfs can buy you some in. If not, Trimar sells them.
Loaches do better in groups of 3+ if you only get one it will hide all the time and be miserable. Botia striata tend to be seasonal round where i live anyway. You don't see them for ages then they are 3 for £10 and all the shops have them.