Excel Master Index with Images

I want to create a "master index" of our product library with images of our products. I then want to be able to reference to this "master index" spreadsheet in each of our individual "client" speadsheets to quickly show which products and their associated images the client is getting. I'd like to only have to insert the images in the "master index" file. Then, for our many client spreadsheets, we can simply reference to the product name and its associated image much more efficiently. I can't figure out how to reference to the cell in the "master index" with the image in it. Typically I would reference another spreadsheet like this: '[Master [login to view URL]]Sheet1'!$E$3 but that doesn't work for these floating images