I need to find that cross reference chart. Back int he days I was the first one that made the ZX10 shock fit the FZ09. That was a game changer for this bike with a shitty suspension, best $60.00 I ever spend on that bike LOL. It was a direct fit and the shock was 10mm longer, just what the bike needed. Once I got the front end spring & damping sort out the bike was on rails, even on track days!
Might just need to do the same for the 6R. Personally I don't feel the need for it. The 6R suspender are mediocre at best but it serve the bike fine for what I do with it. Got the fork rebuilt, fill with 10W oil and top it 20mm more oil than specs (can't remember the final number) then set my front sag around 40mm using washers on each side. Spring rate was within the ball park for my weight according to Racetech website. Rear shock is set at 6/7 to balance with the front around 40mm.