I introduced sound blankets to the UK in 1991 and since then have sold over 3,000 all over Europe including Berlin and Zurich.)
The Chinese manufacturers are a fickle lot and have dropped the black ones in favour of the original blue ones which are well known in the US and Canada as they claim that they sell more blue than they ever did with the black ones. (They even had a spate of only supplying green.)
I stock the blue ones and will gladly get a shipping cost to Berlin if I can get the quantity required.