I Modified the original cover in order to include my initials in the cover.
you will need the original .stl as import file in order for my hack to work.
I also added a space for a 6x9mm magnet to be inserted into the cap, if you are playing at a steel stand the cover can be simply stuck to the panel.
I also thinned the bottom part and cut a flat surface to the part.
On my german style clarinet the fit was quite tight but with a some steam from akettle the fit was easy to be adjusted.