Aww... I missed the Max bit.
https://www.amazon.com/Creality-Timing-Ender-3-Printer-Replacement/dp/B08Z7Z1XLS/ref=sr_1_3?crid=GCN6QMOADVEC&keywords=ender+3+max+belt&qid=1672968420&sprefix=ender+3+max+belt%2Caps%2C185&sr=8-3
Here's the belt for the max.
EDIT -- Here is some raw belt to cut/make your own.