Unfortunately I don't know how long I will have to wait on the TSL Thornbirds, as RC4WD not only removed them from their site yesterday, they also replied to an email I sent about product ETA with this :
"I do not have any information as to how soon these will hit the shelf.
My only recommendation is to keep an eye out for the automated email 
Skyler
RC4WD Support Team"
I had clicked on "Notify me when in stock" and emailed them about having posted on this forum about requesting a scale version of the 1:1 about a year and a half ago...
Kinda bummed, and keeping my fingers crossed as to their prompt release!
I'll likely also pick up their 1.9" Milestar Patagonias coming in a 4.7" O.D., which were also supposed to be shown at AxialFest and released soon after - those are also deleted from their site...
Anyways:
I plan to line the Utility bed with scale diamond plate aluminum sheet, which I already have laying around.
I am also thinking of possibly swapping in a VS4-10 chassis, if that works.
Ideally, perhaps SSD Pro44 axles as well - and possibly converting those to portals at some point.
To me, that would be the ultimate build.
Still undecided on the final cab for it... been looking at everything out there.
As I've said before, I love the MST JP1 body, but I also would like to have a body keeping the utility bed - at least at the beginning, I'll stick with the RTR cb and some paint.
Decisions, decisions!