We would like to buy our shrimp this year from Seafood Industries. We buy quite a bit 20 to 30 lbs at a time. I'm told it is not sold by the pound but by the kilo which is 2.2 lbs. And, I'm told it's frozen. Is it frozen in big blocks? I'm trying to determine how many kilos will fit in a standard size cooler. Can you buy it in a smaller amount such as a 1/2 kilo? Thanks!