From time to time over the last five months, I've seen GI surplus 62 grain Green Tip 5.56 packed in ammo cans at Academy, Cabela's, and even one Wal-Mart. IIRC, the cans contained about 420 rounds, loaded on ten-round stripper clips. Prices ran anywhere from $140 to $160.
The wars are not over: Peace is a temporary state of no war.
Be well.