Probably not the most obvious place to buy a Henry vacuum cleaner
Well one retailer I spotted selling Henry Hoovers at a competitive price was the office supplies retailer Viking Direct which is not someone I would have automatically thought of. Given the number of Numaitic Henry vacuum cleaners being used to clean offices and shops I suppose they are a natural product for Viking Direct to stock.
Viking Direct actually stock two different versions of the little red Numatic vacuum cleaner, the HVR200 as sold by the other retailers named above, and the sightly taller NRV. They also sell oyher vacuum cleaners from Numatic and other manufacturers such as Karcher.