I have just recently upgraded to iTunes 9, and was planning on restoring, however I needed a copy of the iPhone 3G firmware 3.01 file, yet i couldnt find it and would prefer not to have to download it again when it is located somewhere in the Macintosh HD (I hope )

I am on Snow Leopard, and previously went to;
~>Library>iTunes>Software Updates>iPhone software updates
and there was the files, yet now im unable to find them, and im suspecting its because of iTunes 9.
If anyone could let me know where these files have been moved to that would be sweet!