As Plisseeneulinge we did not want to make no matter what, because you simply can not these so give back and they are much more expensive. I was very pleased that I found the needed measure 115 x 130 cm here. The price also seemed reasonable, so I ordered two pieces and the associated clamp bracket for mounting without drilling.
The delivery took place Ruck Zuck and installation was not a problem (even if was in the terminal carriers no guidance here). The pleats look fine, let enough light in the room, are still opaque and can be as desired slide in the corresponding height up and down, so you still will notice something about the environment. When opening the window slackens and rattles nothing - perfect!