Baglux do (did?) a universal harness named Easy. This does not cover the full tank so avoids the worry of scratches, although I never experienced any.
I had full covers on both my VFRs (750FR, 800FiY) and swapped to the Easy and found it excellent.
At the time of fitting I wrote an illustrated report for this site. See it here:-
MV Turismo Veloce, tall-rounder touring bike, thought it would make sense if they did but no, they don't. Maybe too niche.
They do for the Multistrada that I now ride but, as said previously, I'm now a convert to the Givi Tankloc system having sold my Bagster kit. Doesn't protect the tank admittedly but far cheaper to change from bike to bike. Not that I plan doing that any time soon.