Apple Design Keyboard ~ Model M2980
There are 4 versions of the Apple Design Keyboard, M2980, that I know of. None of the parts are interchangeable.
Step 1, determine which version you need parts for by where it was made or assembled and what the flip down and rubber feet look like:
Pictured above in manufacturing date order, from left to right - USA/Mexico, Thailand, China. Last two photos are of the four different key caps all are an F15 key cap in the order of China, Mexico/USA, Thailand A, and Thailand B from left to right.
Thailand ~ Long, narrow flip down feet. (3) Rectangular rubber feet. Stamped label on left. 4 screws.
Alternate version has (2) rectangular rubber feet and 8 screws.