Check out this modular lattice wall: it can be mounted indoors or out and can expand as needed. The only catch is that it hasn’t been manufactured yet (I know, sorry) and will need a minimum amount of people to fund the project in order for it to become reality. So, if you’re interested, take a look at their site.
Borne out of the limitations of traditional wood slat lattice too large for downtown condominiums and apartments, Cellule is snapped together to allow climbing plants to grow in any complex urban space. At 183mm x 183mm (7.20” x 7.20”), it can quickly cover wall surfaces but is small enough to fit most environments and obstacles. Each module has mounting features for cable ties to attach to railings and a generous hole for screwing into wood, drywall, siding, brick, or concrete. Made from UV stabilized polypropylene, Cellule can be used indoors or outdoors and is fully recyclable. -joydevivre.org
sold in sets of 9 modules and caps. Mounting hardware is not included.
$36.15 CAD, Buy it here.