If you know the head shape and diameter, shank diameter and thread length I might have something that would work - not specifically a cycle part, but I can't imagine it being so unusual I haven't got something usable in the workshop.
I probably have.
If I do, it is probably in the shed, and I'm not going out there because dark.
Should be able to get out there before or at the weekend.
Does anyone have one of these screws knocking about or know where I can lay my hands on one? Thank you.