Brittany, what I did was duplicate the crossfire, and wallah, you have two. I will say that I reduced the top enclosure by 4" all around the "footprint" which is length X width so that the smaller one sits easily on top of the larger one. I also screwed in 4 closed in handles on both (the kind you normally find on screened doors) so I have reliable handholds on both for easy moving.
Hope this helps out !
Janie.