I've just listed lots of add ons for the K1600GT/GTL in the for sale section - take a look ......
https://www.ukgser.com/forums/showt...-Headlights-with-Brackets-and-Wiring-Adapters
https://www.ukgser.com/forums/showthread.php/544132-BMW-K1600-GT-GTL-Genuine-OEM-Pannier-Inner-Bags
https://www.ukgser.com/forums/showt...pter-cable-for-Apple-iPod-Lightning-Connector
https://www.ukgser.com/forums/showthread.php/544136-BMW-Adapter-cable-for-Apple-iPod-30-Pin
https://www.ukgser.com/forums/showthread.php/544134-BMW-K1600-GT-GTL-Genuine-OEM-Top-Box-Inner-Bag
https://www.ukgser.com/forums/showthread.php/544128-BMW-K1600-GT-GTL-Oil-Cooler-Guard-by-Wunderlich
https://www.ukgser.com/forums/showt...-Marathon-Touring-Vented-Screen-by-Wunderlich
https://www.ukgser.com/forums/showthread.php/544116-BMW-K1600-GT-GTL-Brake-Pedal-Extender
https://www.ukgser.com/forums/showt...-Leg-Protectors-Wind-Deflectors-by-Wunderlich
https://www.ukgser.com/forums/showthread.php/544114-BMW-K1600-GT-GTL-Engine-Protection-Bars
https://www.ukgser.com/forums/showt...-GT-GTL-Top-Box-with-integral-LED-brake-light
https://www.ukgser.com/forums/showthread.php/544111-BMW-K1600-GT-GTL-handlebar-riserss-by-Wunderlich
https://www.ukgser.com/forums/showt...-GTL-foot-peg-lowering-brackets-by-Wunderlich
https://www.ukgser.com/forums/showthread.php/544105-BMW-K1600-GT-GTL-Sargent-Seats
https://www.ukgser.com/forums/showt...-Headlights-with-Brackets-and-Wiring-Adapters
https://www.ukgser.com/forums/showthread.php/544132-BMW-K1600-GT-GTL-Genuine-OEM-Pannier-Inner-Bags
https://www.ukgser.com/forums/showt...pter-cable-for-Apple-iPod-Lightning-Connector
https://www.ukgser.com/forums/showthread.php/544136-BMW-Adapter-cable-for-Apple-iPod-30-Pin
https://www.ukgser.com/forums/showthread.php/544134-BMW-K1600-GT-GTL-Genuine-OEM-Top-Box-Inner-Bag
https://www.ukgser.com/forums/showthread.php/544128-BMW-K1600-GT-GTL-Oil-Cooler-Guard-by-Wunderlich
https://www.ukgser.com/forums/showt...-Marathon-Touring-Vented-Screen-by-Wunderlich
https://www.ukgser.com/forums/showthread.php/544116-BMW-K1600-GT-GTL-Brake-Pedal-Extender
https://www.ukgser.com/forums/showt...-Leg-Protectors-Wind-Deflectors-by-Wunderlich
https://www.ukgser.com/forums/showthread.php/544114-BMW-K1600-GT-GTL-Engine-Protection-Bars
https://www.ukgser.com/forums/showt...-GT-GTL-Top-Box-with-integral-LED-brake-light
https://www.ukgser.com/forums/showthread.php/544111-BMW-K1600-GT-GTL-handlebar-riserss-by-Wunderlich
https://www.ukgser.com/forums/showt...-GTL-foot-peg-lowering-brackets-by-Wunderlich
https://www.ukgser.com/forums/showthread.php/544105-BMW-K1600-GT-GTL-Sargent-Seats