I finally got my hands on the ATM stock from Samson. It's being sold as a Ruger product on their site. I have to say, I love it. It's super solid, doesn't feel cheap at all. This really makes me excited to shoot my Mini 14 again. I've taken it out a couple times now since adding this stock and it gets some interesting looks. They don't sell a black version so I bought the stainless and had my gunsmith Cerekote it to match the finish on my rifle.
Here's where you can buy one: https://www.samson-mfg.com/a-tm-fold...r-mini-14.html