I like Tekukor available on amazon. They have many colors and also a 160 gsm version. I’ve used a couple of their notebooks.

Tekukor A5 Notebook Hardcover Dot Grid - 100gsm - Dotted Pages For Bullet Journal - Black https://www.amazon.com/dp/B01MT974AP/ref=cm_sw_r_cp_api_i_EkUPEb54P3QER

I’ve used this notebook multiple times, and I think it’s great for the price. It’s 100 gsm, which is thicker paper than moleskine or leuchtturm, so it will hold up to markers better. Down in the description, they have links to other colors than black.

Tekukor A5 Notebook Hardcover Dot Grid - 100gsm - Dotted Pages For Bullet Journal - Black https://www.amazon.com/dp/B01MT974AP/ref=cm_sw_r_cp_api_i_HH4bEb7Q9RJ94