My company does DVD duplication with all the options you could want: full color thermal print, black only print, lots of packaging options and fast turn times. For 1,000 pcs you probably want to replicate, and we do that, too.
You can check out our site for instant pricing or feel free to call or email me directly.
I"m a big fan of Kunaki.com, myself. They duplicate discs rather than replicate, which is sufficient for most applications, so they're extremely inexpensive. Not user friendly, by any means: the system is totally automated. I've been very pleased with everything I've gotten from them.