When my Aimara was shipped to me a milk jug was cut open to put the fish in, then just bagged the jug like a normal shipment. Jug had lots of holes in it, but beware of any burs that might pop up when the holes are made. Could use a tupperware, bucket, possibilities are endless.
Use pure O2 and bag buddies and you should be able to just fedex overnight it.......
IF thin bags concern you contact rarefish down in the vendor section- he's got rediculous (in a good way) shipping bags, they're like the thickness of pool floaties. lol. Closest thing I've ever seen to bag insurance.