3rd Unique Component

It just seems civilizations arent that unique. I believe this could be solved by adding an 3rd Unique Component to Each Civ.

Ex:

Mongol - 3rd Unique Component - Tribal Horseman. Replaces Horseman. +3 Strenght, +1 Movement. Recieves double gold upon pillaging

Polynesia-3rd Unique Component Canoes- Replaces Trirreme. No tech required.

Aztec-3rd Unique Component-Sacrificial Altar (UI/UB Replaces Colosseum). +1/3 Culture, +1 Happiness

This has already been modded.

where? please the link