considering you seem to be the main one complaining, why don't you ring them????
I have passed on their comments, I have put it forward to them what you want, and they have all said the same thing...
work out a way to make it worth their $$$$ and they will be happy to help.
they are trying their best to do things and they also always try to tack a couple of non earners onto every shipment. (BTW some top quality Clown knife fish just came in) btw just to give you an idea the current price of halfbeaks (as asked for) is around $20-$30 NZ thats before you consider shipping quarantine, holding and potential losses.... I dont see them being available anytime soon, even though they are high on my wish list.
also think about the step above the importers, maybe the EXPORTERS find that the species you are looking for are not worth their time....