These look to be well made aluminum tanks USA made and reasonably priced.
Products – Trick Tank also a link to a destructive test video of same tank.
I found a few ASME certified air tanks from $159 - $300 10 gal. and 20 gal. with a 175 psi rating. All the portable tire inflation air tanks seem to be non ASME but some claim to be MIL spec (fwiw)