Definitely looks like cam chain guide material. :dont know:
As already said, you have two choices really. Visit an Indy (who to be honest would need to strip bits to give any definite answer) or run for another 1000 miles then check filter again.
I'd do the latter as any stripping will cost you. Of course there is a chance something could let go within the 1000 miles, who knows.
Good luck though, it knocks the confidence in the car and takes the shine off things.
Another vote for Nelson Porsche, as ever, if you were up north. I travel 70 miles to use their services, even though I have 3 other options within 20 miles. Great little outfit.
:thumb: