I was surfed for stuff to sell Dreamcast on school and I found these...
Codercable

Dreamcast Dreamcast Coders Cable kaufen | 5000312 | Konsolenkost
EDIT: Links below need to search manually.
Sega Dreamcast Hello Kitty:
http://viewitem.eim.ebay.co.uk/Sega-...125416381/item
Dreamcast console Blue And White:
http://viewitem.eim.ebay.co.uk/Sega-...793277855/item