Dave Osborne wrote:

Halfrauds is worth a try.

Try in the bicycle repair bit (i.e. scrounge one from the repair guy
if they don't have them pre-packed).

They hadn't a clue, I'm fraid. That's not to say they don't have them, but
....


--
Murphy's ultimate law is that if something that could go wrong doesn't,
it turns out that it would have been better if it had gone wrong.