From that pic I'm guessing you will be posting some pics of finished scenery by next weekend?
That's what I promised Catt anyway...
Walthers, has N scale truck bed kits, for the mini metals trucks, from GCLaser, and they also carry the grade crossing kits, straight, and for each of the standard ( premanufactured ) curve sections. The bed kits can create a wide variety of trucks, from the minimetals.
Or... you can go to the GCLaser website, and order direct.
I have several of these on my Ntrak, shipyard module.