http://www.lerouvray.com/ in Paris.
Has great French fabrics, toiles and traditional.
Where in Germany will you be?
There's a great shop in Munich
http://www.quiltundtextilkunst.de/
And I'm drawing a blank on the shop in Amsterdam. It's right there and I can't remember it. :roll:
And be prepared for some sticker shock at the price of the US fabrics (Hoffman, Kaufman, Kona, etc) on the shelves. ;-)