Years ago I came across an instance of book cover art designed for a specific book being used for a foreign translation of someone else's book. Both were print books from traditional publishers. The artwork was by Michael Whelan and for the cover of Melanie Rawn's The Ruins of Ambrai. The other novel for a foreign edition of Marion Zimmer Bradley and Holly Lisle's Glenraven. The worst part was that it didn't suit the second novel at all.
http://www.isfdb.org/cgi-bin/title.cgi?474391