Haha. I wish I did. This is a great idea. Good luck.
What size do you need - I have a 58mm lying around.
Edit: replied to the wrong person, apologies.
Kind of romantic and keen to do/see more of these shenanigans - can quickly see a new "anyone willing to swap a ??? for some of my random bike related spares" thread
cheers
@Brum started
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Haha. I wish I did.
This is a great idea. Good luck.