I would need to see your designs before committing to the project, information on scale and where the sculptures are to be placed is also required so I can work out structural elements.
I would supply you with concept images to work out the design specifics, than DXF files.
DXF files are used to cut steel with laser, plasma or water. Working together, we can find a steel cutter in your local area and supply them with the DXF file. They would then cut the design, giving you some shaped steel pieces, we then work out a fabricator to put the pieces together (sometime the cutter will do this also) Then onto an installation person.
I do this all the time with New Zealand sculptors James Wright and Rebecca Rose, both have successful artworks throughout the country and internationally.