I’m a fan of these

They’re flexible enough to bend gently to hold the thicker palettes like Blue Blood.

I’ve heard a good amount of people recommend the star organiser from this post since it’s wide enough to hold some of the bigger palettes.... but I can’t find the post from a while back that linked it! Hopefully someone can help you find it.

Edit: this may be the one! The reviews have some photos with JSC palettes ✨

Simmer Stone Magazine Holder File Sorter, Metal 5 Slot Desk Organizer Rack for Document, Folder, Letter and Book, Rose Gold, Pentastar Shape https://www.amazon.com/dp/B07MYSCDDC/ref=cm_sw_r_cp_api_i_d2QfEbHSXTB07