I think it is possible to find the driver files in the subdirectories of the windows system directory. But why don't you download the driver from HP's web site you mentioned above?

You could open the page Broadcom Wireless LAN Drivers in your web browser and download the file sp33008.exe. Once you have got the driver archive file you can try the following.
Create a new directory and copy the file sp33008.exe there.
Open an LXTerminal and change to that directory.
Use 7z to extract the files from sp33008.exe.
Code:
7z x sp33008.exe
You will find many new files in the directory including a .inf and some .sys files.

I hope that helps.