Find a LFS or online store that deals with the wholesaler Sea Dwelling Creatures. They bring in akindynos and nigripes at least once a month. They got some akindynos in the end of last week in fact. They are still on their in stock list, but it hasn't been updated since Wednesday.
FWIW: Here in SoCal most LFSs charge ~2x the wholesale price. I think that is more than fair. I don't know what the standard mark up is in other parts of the country. Probably more since fish need to be shipped. $150 is 3x the wholesale price for an akindynos pair, and MC is located in SoCal.