Here's a link to all the free themes and avatars. They will be leaving the store on mobile and the web so this is probably the easiest way to get it before
Here are all the new PSN avatars from Software Update 8.00 - One More Game
free ps3 avatar Off 72% - www.otostech.com
Themes and avatars? - Persona 5 Royal - PSNProfiles
Free Persona 20th anniversary PS4 and PS3 themes now available in Japan - Gematsu
Here's a link to all the free themes and avatars. They will be leaving the store on mobile and the web so this is probably the easiest way to get it before