-
Look at companies that do built in wardrobes and entertainment units etc. See if they can do mirrored doors for their units.
We had a local firm do our built in wardrobes and they did the sloping ones for our loft conversion. They also create bespoke units for alcoves etc. They did offer mirrored door wardrobes, but not sure I’ve seen them on their sloping wardrobe gallery. Maybe there are similar companies near you that could create something?