People at the event yesterday agree that Fairphone should release the design files of the slim Covers so people can print their own designs. The actual back-part of the cover is probably easily printable and if done in good quality can work together with the official rim and buttons. ( @Douwe what do you think? )
I’m a big fan of the Idea of printing the back case by our own! I am even willing to pay for the design files (possibly a license fee of 5-10 €), if money is the reason why this idea should not work.