Arduino core for Atmega8u2

Hi all,

I was wondering if there was an Arduino core similar to the Leonardo for the atmega8u2, I am trying to build a simple USB microcontroller baord that is cheap to build and really do not need all the features of the atmega32u4. So i was wondering if anyone has any leads on an Arduino core for the atmega8u2 ?

Please help, thanks in advance,