I just picked up my car after having the same mount/support replaced. I'm pretty sure mine happen during one of my less then perfect downshifts at the track, I luckily noticed it while changing my air filter.
I agree it's going to be a hard sell after five months. Terry can clarify this but with a little patience it did not appear that this would be terribly difficult to install once you jack up the trans, it's only one bolt. I did not look at it very closely so I could have missed something.
