No, that won't work. Air cargo shipment to your nearest airport would cost at least a couple hundred dollars.
And most LFS are not licensed to import either, they buy their stock from a livestock importer. Even then they can't receive them via mail.
You cannot mail any living organism across any border legally. There are good reasons for this law.
If you want shrimp from Vietnam, you will need to hire a broker and pay the hundreds in shipping costs.
Which is cheaper now, buying some 5 dollar PRL and paying 600 in shipping and brokerage, or buying 20 dollar prl already here and paying 20 dollars shipping.