Selecting duplicate clips at once in Premiere Pro

Hi there,

I created a countdown that cycles through 3 images over 15 minutes. There are several dozen duplicate clips of each image. I now want to change the 3 images for use in another event. Is there a simple way to select 1 image with all the duplicates of that image? 

Currently, I hold shift down and left-click on the image and every duplicate of that image. Once all are selected I press alt and drag the new image onto the selected duplicates to mass replace. Hoping there is a simple shortcut to selecting all duplicates at once.