Rolls-Royce Cullinan's Panoramic Sunroof: How much does it cost to replace?

I recently had my RR Cullinan's panoramic sunroof repaired due to water leaks and I'm curious to know how much it would cost to replace the entire unit. The repair quote was around $10k but I've heard of some owners replacing the sunroof entirely, anyone with experience in this area please share your costs and experiences.