I bought the LCD/digitizer on Ebay, the UK sellers are the cheapest.
After some forth and back mailing (the wrong address was used so the screen was shipped twice) I received it. The disassembly went smoothly although it took me a while to find out that the flat cables were locked in place with a retaining tab. Therefore I busted the data display cable. The screen came up in two halves, lots of snow, yellow or red. After straightening the display cable the screen was perfect but bending the cable back in place brought back the snow and discolorisation. For 10 Euro a new cable (also Ebay) and it works like a charm. Total cost 85 euro, 75 for the screen and 10 for the display cable.
Thanks for the guide.