Hi all, 5 years later I stumbled accross that thread, as I was researching "7-Eleven ATM Japan Keyboard".
Because yes, for years I've also told myself "God, I wish I had a full keyboard made of these keys". And I realize I've not been the only one pursuing that (weird) dream.
Let me add some elements for future visitors:
1) Based on the conversation above, I eventually decided to purchase a Topre keyboard.
That one precisely:Topre Realforce 105UB 45g Light Gold on Black Keyboard.
As much as I love that keyboard (now sitting on my desk at work), I can confirm it's NOT what we're all after.
Keys are, I think, way too stiff compared to the amazing 7-Eleven one.
2) So I kept looking and eventually decided to purchase a Topre clone with a 30g keyboard.
That one precisely: Plum 108 electrostatic capacitive pro mechanical keyboard topre clone switches gaming keyboard black side print 87 TKL RGB KB / 30g.
And I feel that one is actually really close to the 7-Eleven one. I suppose going 25g (if it exists) would bring it to an even closer feeling, but for now, 30g is close enough for me!
Now officially my home keyboard!