Wind breaker/roll hoops securing bolts/screws

[MalcQV]

I'm putting a wind breaker on my Z3 but it seems there are some securing bolts I do not have. Does anybody know what size or where I can get them please?

Top two threaded holes on the support posts.

 

[Mazza]

The ones on my car were originally M8 x 25 hex head set screws. As in picture below

But when I put the roll hoops in I changed them to torx drive as they came with the hoop kit.

You could get hex heads from Halfords or even B&Q

 

[MalcQV]

Excellent. Thankyou very much