Large Diameter Front Hub Stud

Strange one - I have removed the studs from my S3 front hub to put in longer ones for a SIP rim: - one was difficult to remove, so I used a vice.
When it came out, it was bigger in diameter that the other three.
This means that the SIP stud wont fit!!!
Ill use a different hub for this scooter now, but I now need to re-fit the 3 original studs and need to get one with a larger diameter thread - looking at the one that came out is seems "manufactured" rather than home made .
Does anybody know who might sell these?
When it came out, it was bigger in diameter that the other three.
This means that the SIP stud wont fit!!!

Ill use a different hub for this scooter now, but I now need to re-fit the 3 original studs and need to get one with a larger diameter thread - looking at the one that came out is seems "manufactured" rather than home made .
Does anybody know who might sell these?