Is this friend also hooking you up with fabrication work on your car maybe ??? I could go on but I will stop there.
Getting back to your question... Beefy-T's are ring spun cotton, so anything you find with those details and a 6.1 oz. you can use.
Beef-T's are over priced like someone said, And they shrink a lot. I use AAA / alstyle apparel shirts for a lot of shops.