@foxxtrot Ah, searching in DDG wasn't giving me much, but Google is turning up some stuff. In a perfect world, I could find something in the hundreds, around the price of instant hot water dispensers.
@acjay Oh, no. I hadn't actually clicked on any of those sponsored links before. Those prices are *wild*. I'm reasonably sure you could DIY something for ~$250 or so, figured the commercial units were in around ~$700 or so, not well over $1000. Crazy.
@acjay @anildash There are a ton of under sink carbonators you can buy.