You can find just luigi here: https://www.amazon.com/SUPER-MARIO-Acation-Figures-Mushroom/dp/B07KWNN8KD/ref=sr_1_10?keywords=super+mario+4%22+luigi&qid=1638391975&sr=8-10
or
Cat Luigi: https://www.gamestop.com/collectibles/figures/products/super-mario-cat-luigi-with-super-bell-action-figure/228174.html