I tried my hand at making on own blade organizer that didn't turn out so well, so I decided to just go ahead and purchase a whole tool organizer for blades and the rest of the tools I use with my Cricut Maker 3.
It fit perfectly in the machine tray in three pieces.
As you can see, I didn't put my blades in the same places as in the product picture. ?
I got my tool organizer on Amazon. Click to grab one, too.
Let me know how you like it!