Hmmmm, ok. Most utes have a ladder chassis to facilitate the need to carry weight, I think the RVRs look weird enough to fool people into a false sense of security already without the need to increase weight in order to meet DOT requirements.
If you want to get freaky without the need for large vegetables and fishnets outside of the bedroom (not judging, but happy to join in if the safe word is 'bacon') I'd point you in the direction of a ladder chassis. Anything you can fit on it is fine as long as OEM GVM and braking specs are maintained, at least in QLD that is...........but we tend to bang our first cousins rather that our second cousins, so read into that what you want.
Hi Admins! I'm still a weirdo, feel free to delete and/or spank me.
As an aside, there was an Open Gear model that would be the best base to start from if you wanted to turn something that looks like crap into actual crap. My 2c