The only way to get exactly what you are looking for is to build yourself.
However some of the smaller companies like NW constrcitors and maybe even animal plastics would build customs sizes but you would have to ask. There are a few totally custom cage makers like Habitat systems and Custom cages but they run a bit more expensive.
Of course you can always get a cage a little bit smaller than the dresser instead of going to all that trouble. 4' is the next closest size.
I think 5' x 2' is a good floor area however I know of no manufacture that makes that particular size. 5' cages usually waste a lot of material and cost the same as a 6' cage to ship. Not a lot of profit. Remember the plastic sheet goods often come in 4'x8' sheets.
Best of Luck
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Jeremy
"I am become death, the destroyer of worlds" July 16, 1945 Robert Oppenheimer
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