In Tulsa, Okla Army surplus sells a lot of it.
Cool. We used to get semi loads of it where I worked back in the early 80's. We manufactured our own acetylene for use in hard facing oil field drill bits that we manufactured.
I need to stop in there anyway next time I'm in Tulsa to see if there are any USGI machete's. Loaned the one I had to a guy and it never came home. Much better steel than the junk you buy in the big box stores.