My understanding from reading the report is that due to it's un-lifed nature the part wasn't tracked so no one can actually answer that question, or indeed where other ones from the RAF fleet may have got to.
Indeed!
Even with "Tracked" Parts it gets tedious over time to be able to start back tracking to the starting point.....rather than having the starting point at first fit when new and then follow the item as it is passed down.
When you conjure up the difficulty that entails when the tracking is an after thought.....no telling where those parts went to over the years.