Looking for a way to get square skin store assets.

We used to be able to get these images from the Riot client files. While that folder is still on my computer, it doesn't include any skins up from when the legacy client was retired. Maybe a Rioter could point me to where these files could be? I'm betting they're grabbed online instead of saved on the user's computer, but that means they have to be somewhere.

Btw I'm talking about the images introduced when the store was updated. All skins in the store are now displayed as squares and those images are what I want.

Thanks anyone with ideas ^_^