I have just bought this cover to replace the 1 year old Mini Spares waterproof cover that doesn't seem to be working quite as well as it used to.
I have a garage, but it's full of other stuff and I couldn't easily get the Mini in/out, so I prefer to have it on the driveway. I noticed this contraption and that someone was using one for a classic mini. I gambled in hoping the CE would fit, and although the cover touches the rear lights/gutter and the edge of the bonnet, it actually just about fits.
It was only £200 and you can buy replacement covers for £95. It will certainly do for now. Hopefully this helps someone who's struggling to find a decent cover. By the way, you need to secure the cover to the ground, it's not movable once installed.