The M’s you’re asking about are a brand of rox, not ox. There are zero real rox going around in general. It’s been years. Yes you can find a couple people with ocks 20, 40’s and generic mex ox.
It’s up to you to reach out to vendors, price check, and read through their threads to make a good decision so you know exactly what you’re supposed to be getting. Not all are created equally and I’m not talking about real vs fake, because that’s a give in.
-AS