It's entirely possible that Oxbar has discontinued that line. I did a quick search of the more popular online sources and they're all out of stock. That's a dead giveaway that a company has discontinued a line and has released something else. I would suggest finding something else that you like and go from there.
Or better yet, get yourself a nice pod system and find an
e-liquid that you can use in it. A really nice pod setup will cost you less than the price of two disposables.