Not sure if this is news but it was to me. Our cars are officially a classic.

Jaguar Heritage. CLASSIC PARTS
https://www.jaguarclassicparts.com

JAGUAR CLASSIC PARTS
Jaguar Classic Parts is a service run by the Jaguar Land Rover Global Customer Service division. It is the definitive source for Genuine Jaguar and Daimler Spare Parts and Accessories for classic vehicles (generally those more than 10 years old). New to the line-up of models now covered is the Jaguar XK8 (X100), with over 11,000 genuine parts available.

Spares, accessories and consumables are available for the following Jaguar and Daimler Models:

• XK8 (X100)
• XJ8 (X308).
• XJ6 and XJ12 (X300).
• XJS Pre-Facelift and Facelift.
• XJ6 and XJ12 (XJ40 and XJ81).
• XJ6 and XJ12 Series 3.
• Daimler Limousine to 1992.

In addition many un-catalogued parts are also available for Jaguar E-Type, Mark 2, S-Type, 420, Mark X and earlier XJ6 and XJ12 Series 1 and 2 as well as Daimler V8.

The Jaguar Heritage Parts website provides an interactive, multilingual cataloguing and online ordering system, with over 26,000 part reference numbers. It comes complete with diagrams, supersessions and vehicle application information.

An additional service offered by Jaguar Classic Parts is delivery direct to your home or other preferred address, rather than to your nearest Jaguar dealer. At the checkout stage, you will be able to select this option if preferred. A small additional charge will apply.

 

A quick perusal shows some hard-to-find parts listed: pricey, but apparently available.
BTW, red Jags rule!

 

You're not wrong. https://www.jaguarclassicparts.com/uk/news/c16070-limited-edition-gold-plated-e-type-horn-push-medallion