+1 on eco-reefer (
www.eco-reefer.com). I got a 50 lb order a few weeks back (pics are still on my camera) but there was a nice mix of sizes and the shipment was really well packed.
This stuff is also ancient reef that is now far from any water. Pest and algae-free !
Eco-Reefer is a Canadian company so shipping is reasonable and there are no border issues.