Forum Moderators: coopster
I'd probably code something up that does that first, then uses ftp from within a script to transfer the images. Nothing I know of open source, but I don't "do" open source.
You'll have a hard time finding a script to do this without a copy of the db because you would then simply be scraping content from site to site... be sure to let your client know that both sites can't rank well for the same images/articles, one of the two won't be found in search.