Prodrive Alcon calipers
 

Does anyone know where I can buy replacement bolts to fit a set of Prodrive Alcon calipers to the mounting brackets?
Subaru dealers sell the brackets for £57 each but say that the bolts come with the calipers at around £500 each so to buy 4 replacement mounting bolts would cost a Grand! with 2 free calipers.
I have tried M12X70 both 1.5 and 1.75 pitch but the 1.5 pitch fits but seems a bit too loose and 1.75 is not suitable so I assume Alcon must have used some obscure pitch of thread.
Alcon themselves refer you to their dealers who seem uninterested and I doubt if Prodrive will supply direct as they usually deal through Subaru Uk.
Hope someone can help as I currently have an almost complete Alcon 330 mm brake kit as a garage ornament .

Hi I nead one bolt as well as one has rounded off as the in side is an alon key and it slipped

Alcon often use Imperial threads...........

if you had a sample it would be easy enough to ID and sort for you

Alyn