I would take both the drawing with dimensions and the model (exported as STEP) to the manufacturer. I'm designing bended sheet parts at work all the time (well, using CATIA V5...), and the unfolded view of the part is optional as the bending radius also depends on the bending machine available to the manufacturer. Therefore, the manufacturer inputs the STEP model into his CAM software and that one unfolds it while considering machine parameters and material properties (grade of steel, aluminium or whatever). The STEP file is used to get the overall dimensions and bore positions, the drawing confirms the dimensions and adds information as to whether the bores contain threads as well as material, tolerances and surface treatment.
For 8mm material thickness, the shortest leg should be longer than approx. 55mm, otherwise the bending machine can't handle the part.
The bent radius won't be as smooth as modelled, though, as the material will flatten somewhat, especially at the ends.