The lack of a cover was the first thing I asked my dealer about when I took delivery. They said that unfortunately any metal part on top of the dashboard was now strictly prohibited by EU regulations, as such it is now unlawful to fit a tonnau cover. :-/
And there are no plastics that can do the job ?
Sounds like an excuse to me.
I work in automotive from the factory side of things and as I tried pointed out a few days ago, there are now many rules that MMC have to adhere to in order to get this past certification. Having a plastic stud to hold the tonneau wouldn't work as it would snap very easily so I can fully understand why they decided to not go down this route.
Now, this isn't to say that someone can't do this aftermarket but as it's been touched on, MMC would be in their right to void warranty work if anything done outside of the confines of the design of the car affect an area where there is now an issue being called out. I've seen this 100's of times and sadly, it is what it is. Holes would also need to be drilled into the door to get the snaps in place - and should any corrosion happen in that area, well, I bought MMC would honour it as they were not the ones who put holes in after.
I've tried the new top and it's very easy to get up and latched in in quick order and I was able to get it in place without being shown first.
Fully appreciate the desire to have one but I highly doubt MMC will be losing any sales over the lack of one. It is what is it.