generetic is a defunked site now, they will take your money and not give you membership. I don't think anyone uploads there anymore.
www.R1DB.com
www.customaniacs.org
www.hirescovers.net
all are HIGH RES sites but pay sites, but are excellent sites. I only use cdcovers as a last resort for something I can't find elsewhere, the stuff there isn't high res and often grainy or off cenetered.