https://soundwavesartfoundation.com/collections/signed

The Eric Clapton version was posted a few days  ago, but there are tons of big names here to choose from .  These are pricey, most seem to range from $300-$800.

Cyndi Lauper

David Gray

KISS

Bullet For My Valentine

Brandi Carlile

Willie Nelson

Offspring

Adam Lambert

Mark Knopfler

Roger Waters

Evanescence

Judas Priest

Blondie

Alice Cooper

Pixies

Train

Ray LaMontagne

and many more