I was browsing through ebay and came across this:
OBD Diagnose Service Rücksteller FÜR Porsche 911 997 996 993 987 986 Cayenne | eBay
I did the translation and took a chance. Won a similar listing for 67 euro including the shipping. Item has shipped DHL. It was a low risk purchase, could work out well. No case, just the cable and software.