Let's see, dragons I don't need:
Albino Wyrm
Adamantine
Amber
Brine (which I just realised might be printed in the Dragonlance monster book)
Chromium (Chrome)
Cobalt
Dracohydra
Electrum
Iron
Nickel
Moonstone (Allready in the draconomicon, listed as Ethereal Dragon)
Jacint
Jade
Pearl
Prismatic (which btw, can be found in the ELH.)
Purple
Sea Wyrm
Steel
Tungsten
Yellow (Desert variety, but that might be printed in the next FR source book).
And I think that's it.
But I do need the second article on the missing chromatics if it is not to much trouble, as I am having trouble finishing the conversion of the Orange dragon without it.
And thanks!