Hey! If you search the forum (use the search button at the top right) you should be able to find the VEX Fusion360 Parts Library by @AliA and @changdou
Here’s a link to the post:
Hope this helps!
If you still aren’t able to find parts (such as new releases), you should be able to find them on their vexrobotics.com store page, scroll to the bottom, select the “CAD Files” tab in the item description at the bottom of the page.