If you are still looking for a header (or if anyone else in cyber-space is paying attention) you can check out these links to see what is out there:
www.tycoelectronics.com
www.laddinc.com (Deutsch)
www.molex.com
Then go to these links to purchase what you like (please note: a lot of items you find on the above sites are not readily available to the public. However, you can find a lot of cool stuff you can buy online):
http://www.alliedelec.com/
www.mouser.com
www.digi-key.com
www.newark.com