When you need to put in a new sheet of foil at the inside of the door, behind the door panel, with the template I made you can make it yourself and save about 25 euro's.
The other advantage is that you can make one from a sheet of PVC instead of PE. PVC is stronger and sticks much better.
And when you mess up one in gluing it to the door, your financial damage will be a few euro's for a new sheet.
In the attachment you will find instructions, the template, and some photos how I created the template and the result.
I want to thank Martinm70 for sending his old doorsheet that helped me a lot in creating this DIY version.