Clasp lock screw missing

Hi,

I have somehow lost one of the two clasp lock screws, that sits just around the locking mechanism, for an Aqua Terra 220.10.38.20.02.001. I have searched and tried to find out how to get hold of a new one, but failed to find a solution. My AD said they'd need to send the watch in to Omega for repair for such a small thing, which I found quite ridiculous. Is there anyone who knows what to do or where to get one?

Thank you!