THANKS!
@MidMazar the plexi box is bought from sora.de (only german). They offer these custom made for your needs. But I can't really recommend them... As you can see there are screws everywhere (I can take a close up of the fixings if you want) and they are not dust proof... Actually I only tried them because they are not really expensive and I simply needed a cover for the racingminiatures CF base. So to be honest I wouldn't buy it again...