I'm going to convert mine from pickup bed to flatbed. I found a 12 1/2 foot flatbed w/ headache rack, holes already drilled for reels, etc (used to be a flatwork bed), along with a 510 gallon tank already plumbed and lots of plumbing under the bed.........all for .....$600.00 installed.
It is at a friend of Chris's junk yard on an F450 two years older than mine. Should be a perfect fit. Now If we can just get together on a time to install it!