Unfortunately, you lack the patience to simply WAIT.
There have been major changes in 1.3, not just to Minecraft itself, but to Forge as well.
The modders are working hard on it, but they seek your cooperation to WAIT and it will come. Promise.
Having dabbled in modding, I can say it's not easy.
And also, no one's stopping you from using MCNostalgia to backdate to 1.2.5.