The stands are known as Sheffield Stands (in the UK) and the first point of contact to determine a local supplier should be the local authority. In London we, the London Cycling Campaign, have successfully campaigned to make these the standard and reccomended bicycle rack for a majority of boroughs in London. Any cosmetic variations designed to keep with local characteristics should match strength and installation integrity.
I would urge you to petition your local authority to include these stands as a requirement in any urban development governance documents as a key step in ensuring their proliferation.