So I was ACF50ing my 2016 R1200GS and this grommet fell off. I can't figure out where it came from, other than to say it is from somewhere on the bottom of the bike, near the centre stand, and towards the right side of the bike. That's where I was, wiping down metal parts with an ACF50ified cloth, when then dang thing fell on the ground in front of me.
Had to be me. Someone else might have gotten it wrong.