Interesting - I've never seen it at Whole Foods in NYC, but I also don't think that I've looked for it there. Do you remember the pricing? And whether it was tuna or gray mullet?
Unforunately, according to a disclaimer on esperya.com:
"From December 2003 on, because of new FDA rules, it is impossible for us to ship to United States, Canada, Mexico, Caribbean, Central and South America."