Picked it up at Home Depot, along with all the rest of the supplies. I saw all of the storage options that people have built but honestly I just needed a level floor for when I'm camping, and I'll take it out when I'm back to civilization. The whole thing cost <$40 and took maybe 1.5 hours to...
I had the same question and came up with nothing. Today I took care of it on my own though. Turns out a set of 2x2 posts with a 1/2" thick plywood board on top + carpet is exactly the height you need to level it out. And the board is 41x43. Here's mine.
First post here, just picked up my 2014 TE today. Thought I'd contribute to the images, here's one I picked up off google and adjusted in photoshop to fit the screen specs!