Sorry I was unable to help much, I am more than 200 miles from NYC, and the back roads to Fingerlakes Aquaculture make it take forever if you are trying to go east west.

One other glitch; you need a stocking permint in NYS to purchase fish from a DEC qualified fish hatchery to stock ponds in NY. They ask a lot of questions of the destination body of water to prevent altering sensitive ecosystems. I dont know how that would work for out of state let alone out of the country.

Fish transfers must happen somehow for the tropical fish trade, but my guess is you may be better off finding a pet or tropical fish store and requesting some US natives. Have them shipped the same way tropical fish are.

You have a tough challenge ahead for you though. I wish you the best of luck!