I had the same problem locating this. With the bulb gone I just couldn't see it with the naked eye.
I stuck a camera under the footwell and took a picture and then spotted it right away! Its on the right hand side.
Thanks for your post which reminded me that I needed to replace the bulb for the drivers foot-well.
Found I had a bulb stored away in a spare car bulb box and fitted it yesterday. All working fine now.
When you open the doors I've counted up to 7 courtesy lights of one kind another come on.