I am not sure what that kegerator looks like but what I did when I was sizing my freezer for kegs is cut out cardboard circles that are the diameter of cornys and place them all in the bottom of the soon to be kegerator. If height is a concern, take a tape measure and measure the inside of the kegerator vs a corny. I hope this helps.
"Offered a Bud Light, and a glass of water - I'd drink the water. You only have one liver, don't waste it on bad beer." - Brock Wagner