Hello, first post here and hoping someone can help. We have inherited metal poles and connectors for a veg/fruit cage but need to replace some of the corner connectors. See photo below. Despite hours trawling the internet we can’t find who made the cage. The black coated poles are 22mm in diameter and have a nodule that slots into the connector. It’s old but still very usable if we can get corner connectors. Does anyone have similar and can say who manufactured it?? Thank you in advance