Ninjago lightning and fire dragons
I can think of several possibilities:


Just be patient. They'll probably come up on bricklink or ebay eventually.
Buy the complete sets and sell off the parts / assemblies that don't interest you.
Buy the sets with someone else and split them for the parts / models that interest each of you.
Get the instructions, and buy the parts to make the dragons individually.
Create your own dragons from the any parts you already have or can get easily.


It depends on how much you want the dragons. If you really need them, I suggest (2) might be your best bet.