Thanks for your thoughts. Unfortunately the car is in the local garage for service and annual test, which is where the damage came to light. However, I’m pleased to say I have managed to find a brand new Montreal; eye wateringly expensive but it’s the right one!
Hi...welcome to the Club
....and the wonderful world of Jaguar!
David Manners or other Jaguar specialists should be able to help with new lenses otherwise eBay for secondhand ones