Jjake - Try to reach them at one of these links. Explain in clear detail what it is you are trying to find and why you are contacting them due to inability to get any help from Beretta. They should be able to help you.
Tell them that Beretta just doesn't care about 4 screws in this case.
Let me/us know what you find out.
Tom
Correction after posting - I don't think either of these links will help. You might as a last resort - write them and explain your problem and hope they send you the screws. They might. Be clear....they speak fluent English. Their address is on the link.
Tom
www.sako.fi www.sakosuomi.fi