For over 60 years Linhof sold cases both metal and leather which were made by ROX and had the Linhof Logo screen printed inside. Google: Linhof ROX Case -and you will see some examples.

ROX is a German company and still makes nice cases however not Linhof specific and I don't see any leather models for sale - https://rox.de/en/rox-shop/aluminium-cases/

They also have a line of photo cases similar to the Nanuk type.