with no current importers responding what an ex importer has posted is the closest to an answer as to why they don't do it you will get at the moment
HFF did communicate through this site a while back as to what should be imported
a few said they would be interested in certain fish
not as many purchased them
i think if you set up a business on peoples wish lists disappointment may arise
what we want, what is available, what arrives, what survives, what eventual price it is sold for is a lot of variables
maybe best idea is to get some money together and finance an importer to bring in what is wanted