Below are details and photos of the Mitsubishi L200 Series 5 (2016 Model) Hard Top canopies and Hard Top Tonneau Lids I can supply. The Fiat Fullback is the same size and dimensions of the Mitsubishi L200 Series 5 so will fit the same. Please read below for further details.
Click on the photos for a larger view.
I typically supply 3 types of Hard Top for each pick-up truck model.
A sloping Hard Top model
A Tonneau Lid / Canopy lid model
A standard canopy style model