Hi,
I cannot do it for you, but I can give you few tips how to do this
1) Because each menu item has its own ID - you can use it creating a page suffix
and then using a CSS override image
Or
2) Use Custom CSS module (you have to install) with your CSS which will override a image and assign to page - and using Copy feature make as many clones as you need each with different image.
Both solutions works. I used them many times.