AI unit cost Mod?

[gyver]

Is there a mod that makes AIs units cost half the hammers of yours but also makes the AI perceive the worth of their units at half as much?

Basically I can generally beat an army twice the size of my army without much trouble, so I'd like to make the AI able to build twice as many units without giving him the huge bonuses to tech, building production, happiness and income that comes with increased difficulty setting. I'd also like that when the AI has an army twice the size of mine, to believe that his army is equal to mine in strength.

Does this mod exist already?

 

[Jabberwockxeno]

Wouldn't it make more sense to buff up the power of the units, or play on a higher difficulty then?

The former would be easier as you'd just have to increase the combat power values, and the latter would be the easiest, of course.