Can someone give me a rundown on what kind of lighting kits have been made for Märklin Z scale passenger cars, especially the Swiss ones. I've seen e.g. 87661 SBB Panorama car with lights so I assume there are official Märklin lighting kits for it, perhaps for all of 87660 (a 6 car set including it), or 87663 with similar cars. I've also seen a 87456 SBB passenger set with lighting. At what point would such lighting kits have changed over to LED?

Which brings me to 81195 - will there be some kind of lighting available for these double decker coaches?

87456: (86455 was older, 87457 is slightly different)


87663: (87661 Panoramic car included, 87660 was 6 car version of this)


81195: (81413 was similar)