Are you working from an Atmel application note? If so, go back to their site and find the download page for the app note and see if there's a link to download the source files.
It's not likely that someone here will know exactly what you want. You need to take the initiative and do the searching yourself. You already know the name of the file you want; that's a good start. Try to figure out where this file would be located, based on the documentation you have that refers to it. Use Google!