Hexagonal grid notebooks

Hexagonal-grid notebooks like Hexanote [Amazon] are marketed toward organic chemistry students and pros; the image here is from the thicker, spiral-bound Benznote.

But I'm thinking ... maps.

Unfortunately, the paper in all the available offerings is lightweight and probably won't hold marker pigment well, let alone paint. (The big-sheeted dry-erase grids intended specifically for games look like a lot of fun, but aren't what I'm looking for) Is there, to the best of your knowledge, a hexagonal notebook with paper that's 100gm or more?

Watercolor paper would be ideal, but I'm not fussy.

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