A German online store sells "Rave" accessoires, (they call it "Bild- und Druckmaterial" which means photos/pictures...
but that's the only shop I know which sells it.
The Price is only 8.55 DM (ca. 5 $)
If anyone wants to order:



http://www.adori.de



then search for "rave un2" (that's enough)
click on "Finden!" which will lead you to three results.
(Vinyl, CD and, at the top "Bild- und Druckmaterial")
I ordered it today, so I don't know exactly what it is, but as soon as I get it I'll post here.
If anybody would like me to order for him/her, just drop me an Email.