The Truma is designed to fit in that same hole. The door needs to be installed perfectly though or you will see a paint edge.
What might be a better option, is we can provide a black paint Truma door. Then, no need to take it to a paint shop...and it would match the black door trim, black windows. We have done that before.
The biggest issue is getting the flow right, which can be done. I do know others have adjust the flow sensor, but that would void the warranty I'm guessing.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).