I do have a M96 engine with flywheel attached, but the issue is that it is currently in the car, fitted with a clutch and bolted to the G87.21 gearbox. I don't plan to take that apart for the coming year as I will be building up my V8 swap in a spare tub.
There seem to be quite a few people on the forum working on their engines at the moment, so I would suggest to look around the recent post and see if someone is willing to take measurements. Otherwise I can do that in a few weeks time when I pick up the tub. That company always has a few engines around.