I got mine at Pet Supermarket, $3.99. I don't think they stock them regularly, but your LFS ought to be able to get them. For me they're sort of a "cooler" alternative to tinfoil barbs, similar in many ways but they don't overshadow everything else the way the deep bodied lemons and tinfoils do.
yeah my one specimen is a foot long or more now, very peacful with the other big barbs and big Characins. He is a very interesting addition to the monster fish collection
i had manny in the past, there great schooling fish but had to get rid of them i could never get any food down to the cats no matter how much i threw in.