We found some nice tutorial on a German website, for your own DIY LEGO Pi Case!!
The Original Article was way before and also a case to buy, here’s the article: https://www.raspberrypi.org/blog/lego-nespi-case/
Buy it here: http://www.raspipc.es/public/home/index.php?ver=tienda&accion=verArticulo&idProducto=1305?setLocale=en_GB
And here is the Tutorial for you own Case, made with LEGO Digital Designer:
Download: pi-modell
Download: lego-nes-case-instruction
Source: https://www.andrerinas.de/tutorials/nespi-like-lego-nes-case-anleitunginstruction.html