Search for the avatar on PSPrices or similar sites.
PS3 avatar service
PS3 avatar purchase
This section only concerns PS3 avatars found on sites like PSPrices.
You can also request multiple avatars, but your account must have enough PSN balance to complete the purchases. Before proceeding, contact me
Assisted purchase
The avatar must be available in the store of the same region as your PSN account.
You pay for my service, you must have the PSN balance for the chosen avatars and provide me access to PSN via cookie.
Browse directly available PS3 avatar packs and open each pack to see all files.
PS3 avatar catalog
Available packs
Search a pack, open it, preview all avatars, and copy each filename directly from the popup.
Thanks to Sekai for providing many of these avatars.