your best bet is to find a local who keeps them and get a nice 2 or 3 polyps of a healed/established frag...
you can find them through online vendors at times, but most if not all will rape you on the price and then you have to deal with shipping and these things imo and ime, are finicky as hell... very sensitive zoas when things are not stable...
i have grown a colony of 150+ polyps, from 5 polyps, in 9 months myelf, so they grow fast IF conditions are right, contrary to popular belief...
GL, im sure more will chime it...