YouTube has 692 clips of Marlene Dietrich items (not all Marlene). There is at least one "Sagt mir wo die Blumen sind" - here . The backing arrangement starts simple, but unfortunately builds exponentially verse by verse before relaxing a bit towards the end. The way YouTube arranges "Related Videos" is useful here - among others, there's a cover of the same song by Joan Baez here with a simple guitar backing. May be worth just keying in the titles you're seeking in the YouTube search box.

Ross