It snapped while driving and I can’t find the part online could anyone help?

One advantage to having owned too many different vehicles over the years is driving the same fun roads in many different cars...and this is by far my favorite for every single one of those roads thus far.

2,777lbs curb weight. roughly 52%front/ 48% rear weight distribution. Built off i6 car with steering rack
Stock front and rear sway bars
Ls swap with rear mount radiator and remote electric water pump. Coolant capacity is just over 5 gallons.

Replacing the clutch on my 540/6 while the engine is out, does this flywheel look like it needs to be replaced? The car was on its factory clutch at 214000 kilometres and the clutch was not slipping.

Also should I replace the rear main seal if it’s not leaking just in case or leave it alone if it’s dry?