Need Twenty Ten 1.2

I messed up (I’m a newbie) my Twenty Ten 1.2 (I now know what a Child theme is and how to use it) and I can’t find ANYWHERE to download the new Twenty Ten 1.2 Theme. All that’s available is 1.1 and it functions differently. (I can use it, but would like the newer version.)

Is there a place where I can download the 1.2 theme?

Or is there a way to revert the theme to default (ALL setting and changes to the theme erased) without losing my content?

Any help would be appreciated.

Thanks,

-MJ