AVR-Chat

Hi,
   Has anyone seen any code to do On Screen Display on the AVR or any 
other Microcontroller. Or even a current dedicated IC.
As the ST5730 has gone out of production.
I'm thinking teletex decoder must use one and some philips 
Microcontrollers (8051) had them built in for TV applications.
I'm trying to find someone that sells them. Australia preferibly but 
doesn't have to be.
And yes I have checked google.

Cheers
Rod