I got this one from swigzy and I love it https://www.amazon.com/Swigzy-Holder-Expander-Adapter-Adjustable/dp/B0752DZ1SB/
Edit: I'm dumb, that was for my water bottle holder. You asked about the cup holder insert, which was this one: https://www.amazon.com/gp/product/B0B799STMB/. It came as part of a set with the console inserts.