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
Capcom News Mobile
PlayStation Store: Celebrating a Decade of Downloads – PlayStation.Blog
Amazon.com: Avatar - Playstation 3 : Video Games
PlayStation Store: Celebrating a Decade of Downloads – PlayStation.Blog
Avatars for PS3 • Page 1 of 67 • PSprices USA
PlayStation Plus Top Dawg Avatar on PS3 — price history, screenshots, discounts • USA
best looking preorder avatars for ps3 games? - PlayStation Network - PSNProfiles
XSEED Games on Twitter: "Good morning! The rest of the Trails of Cold Steel avatars are now up on the NA PlayStation Store! Enjoy! https://t.co/emO2FbewYf https://t.co/EgDXpjv4jc" / Twitter
Bought the SH avatars before the PS3 store ceases to exist. Worth it. Atleast I'll have something cool on PS5. : r/silenthill
Darkstalkers® Resurrection Morrigan Avatar PS3 — buy online and track price history — PS Deals USA
Sony Giving Lifetime PSN Members an Exclusive PS4 Avatar
10 New Red Dead Redemption PSN Avatars - Red Dead Redemption
RPG Site on Twitter: "You can now grab a bunch of Persona 5 avatars and themes off of PSN https://t.co/GW3FzrpYgt https://t.co/Gi9cRzlwVW" / Twitter