Okay..dont laugh at it!
We(actually hubby) took an unused corner hutch and took out the shelves and cut holes in the center dividers, so bunny could hop through. Then he added another section of flooring to it to make it bigger. Then he enclosed the whole thing with old fencing/pen panels... dont mind the stain job...
we just used what we had left in the basement! And Presto! his new cage made with recycled stuff laying around our house..its not very pretty, but he loves,loves it! hes been doing the happy bunny binky hop all night!