so... not much help, but what I did find is that it's a big line of products from something called "Alpine Tech" or "Alpinetech" The ATI is an indicator for that. The part number is listed on the item as well. They also have an Amazon store.

I couldn't find any other info about anything called Alpine Tech or ATI in regards to who might actually be 'making' the switch.

Based on the item listings I've seen directly from them on Amazon, I'm guessing they're a random amazon shop that's not a real business and just buys up chinese stuff and re-sells it (not that there's anything wrong with that... he said as he looks at his shelf full of chinese stuff).

Here's teh Amazon Store

http://www.amazon.com/gp/node/index.html?ie=UTF8&marketplaceID=ATVPDKIKX0DER&me=A1ZFJY6YSKB3ZG&merchant=A1ZFJY6YSKB3ZG&redirect=true

And here's what you were looking for I think.

http://www.amazon.com/Alpinetech-Anti-Vandal-Stainless-Momentary-Terminal/dp/B00MB5CXKC/ref=sr_1_1?m=A1ZFJY6YSKB3ZG&s=merchant-items&ie=UTF8&qid=1419086456&sr=1-1&keywords=12mm&pebp=1419086481061

I don't see a 12mm version that has the same actuator as what you linked, only the domed version. But I'm pretty sure that's the same back end, smaller panel cut out, same depth.