Warlord Games now has their Army Painter Warpaints available in individual pots. Check it out.
From the update:
The Army Painter Mega Paint set and their Warpaints boxed set have gone down very well with you and now you can get hold of the entire line as separate pots!
Warpaints is an acrylic paint range specifically designed to compliment both the Army Painter Colour primer sprays and the Quickshade dips. It has the best suppliers for each type of paint (Colours, Metallics and Inks) and so is unparalleled quality. It comes in full 18ml. dropper bottles enabling you to administer the exact amounts of paint you need, without having to open the lid all the time – thus avoiding the paint to dry out.