https://www.amazon.com/Silicone-Non-Slip-Analog-Joystick-Controller/dp/B0BWCP149X/ref=mp_s_a_1_8?crid=21UQUJJPBP1FB&keywords=thumb+sticks&qid=1687745622&sprefix=thumb+stick%2Caps%2C153&sr=8-8
Here's the actual link