FassadenGrün sells small and medium-sized stainless steel trellises. But for larger areas and longer wall surfaces, wire mesh panels (often used for making metal fences) and metal mesh mats/grids are a better option. They can be used as an inexpensive climbing aid for retaining walls, noise barriers, parking garages, and other buildings. Further examples can be found in the section on parking garages. The next topic will then deal with flexible grids, so called "modular trellises."
Metal 'mesh panels' (mats/ grids) are well suited to build climbing aids for plants on facades. They are otherwise used for fences and partitions and are made of hot-dipped galvanised steel. Reinforcement steel mesh (for concrete) can also be used; these are very cost effective. Side grids of gabion lattices can be purchased individually and used as a trellis. They're mostly made of galvanised steel but can sometimes be found in stainless steel; because of the narrow mesh, they are a little more expensive. Decide on a case-by-case basis which type of grid or wire mesh is best suited as a trellis for your project.