[Rockdrigo]

Album artworks in ITunes usually have a good quality and the site has many artist's works I couldn't find anywhere else.
Unless you buy them, the album covers can't be directly downloaded, so after some search I came upon this guy's online finder. Just fill in the information and search, and you almost always get the artwork as a 600x600 JPEG when you choose Standard Definition.

https://bendodson.com/projects/itunes-artwork-finder/index.html

Also, it'll be great if someone finds a way to download artworks from Spotify.

[albummaster]

Thanks, interesting link. FWIW, BEA already uses the iTunes, Amazon and eBay search APIs (amongst others) so this is something BEA could do as well & might be useful for newer releases. However, the original artwork for older albums is unlikely to be found on digital services which is why there's simply a link to a Google Image search on the album admin pages (which casts the net a bit wider).