Can anyone recommend the best place the get 1,000+ DVDs REPLICATED?

I am leaning toward CD Technical per Benjamin Hill:
CD DVD Replication : Disk Duplication : CD Rom Replication : DVD Duplication Services Iowa : CDTechnical.com (http://www.cdtechnical.com/home.php)

Anyone ever use them?

No, but there's been lots of discussions here. I'd recommend a search of the list.