>>8939386its tiamat which is bigger than a normal D&D dragon. there aren't many options for Tiamat out there, DESU. there was a knockoff statue from reaper miniatures that was $99-$199 but it's been out of production for over a year now. But even that requires painting.
only other option would be buying 5 $10 toy dragons and chopping heads off to make custom fig. I did that for my friend's D&D game. The figs were all 6" tall so standing next to the characters (all a few cm tall) they were to scale.