Glee pannier rails to take ally boxes

[Mark Shelley]

I have pretty much decided that the bike I need to downsize from my R1100GS for two-up touring is a Glee. I love my ARDCASE ally panniers as their box shape and top loading is so much more practical than the stylised plastic cases. On my GS and Transalp 600 I use Givi rails with the mushrooms and `toblerone` removed which works a treat. I see this one is available, but are there any other rail systems available?
https://www.motocard.com/en/fitment-kits/givi-pl3101.aspx?ctry=uk&currency=&utm_campaign=comparadores&utm_source=google&utm_medium=comparadores_en&utm_term=fitment_kits_givi_m-0559721&size=UNICA&gclid=CPmPqc6S880CFRFmGwodaUoPpw#description