Are Copic Sketchbooks no longer bring made?

For the past year or two, I've mainly used the 9x12 Copic sketchbook, and have gone through one so far, with my current one almost full.

I've been looking to buy a new one, as I've grown to really love the whole feel of it and how it works with my materials, but I can't find any in stock anywhere, even in different sizes.

Are these just currently unavailable, or are they no longer being made? If so, does anyone have any similar sketchbook recommendations?