>>364741692
The catalog system is a little bit mysterious if you're not used to it, you need to have the EX menu catalog open in proximity of the booth. 

If you can't find something, usually the best thing to do is go to: https://winter2021.vket.com/en/world/5

This avatar you have posted there is made by Minty: 
https://winter2021.vket.com/en/circle/414

but you're right, it's not for download for some reason.