https://www.ebay.co.uk/itm/Jaguar-XJ-S-Complete-Dash-Instrument-LED-Bulb-Set-Upgrade-Blue-Display-Up-to-91/302527984018?hash=item467012b192:g:y5wAAOSwN5BalBIJ

They have a green and red set too at the moment and I have seen the white ones in the past as well.