Geneve 165.041 Looking for Screws & Gaskets

I just purchased a Omega Geneve with a 552 movement on eBay which is in need of a few parts. The most glaring of these is replacement case clamps and screws which the seller didn't mention had taken leave of the watch at some point. There's also a missing dial post screw. Both the back gasket and crown gasket are worn out and in need of replacement.

I've tried finding part numbers for these without success. And tried searching this site for previous posts but can't seem to find an answer.

Any help welcome.

Thanks very much for the help. Any suggestions of where I could find the parts?