Can you buy vocaloid songs/albums on the itunes store?

I really love vocaloid songs and i try looking for them on the itunes store.But all i see is weird stuff.My sister told me that her friend buys vocaloid songs all the time on her ipod touch.But when i looked on my ipod touch i saw weird stuff.I saw this one song that said miku and rin sang and searched on youtube and got no results for it.Do i just download the songs from a disc or what?please help!