Construct an Amourphous Cell Box in Material studio [Vacuum + (Water + molecules) + Confined layer  Fe(110)

I'm new in Material studio. I would like to construct an Amorphous cell box for my simulation with the characteristic bellow:

1. Vaccum

2. Water + molecule

3. Confined layer

4 Polymer

The sketch of the box is attached.

Thank you in advance for your kind answer.