One thing I learned about my fuge is that I probably could've gotten by with a plastic or rubbermain tub instead of an aquarium. Since you might have be able to bend it or manipulate it to get it to fit better, why not see what size tubs you can fit under your aquarium.
Plenty of people using tubs or buckets for refugiums instead of aquariums.
Plenty of people using tubs or buckets for refugiums instead of aquariums.