Since one button of my N900 is defect, I want to repair - but what do I need? The button still works if I press it, but the ´clicking´ is gone...

Do I only need the keyboard itself (as seen on my attached picture)? Are the switches integrated into it, or are the switches part of another thing below the keys?

The frame around the keys is also broken, directly at the defect button...is there a spare-part description/pictures anywhere maybe?