Unfortunately parts for these cameras is non-existent from Google direct. Although for screws, you may luck out spending some time in the nuts and bolts section of your local hardware store. I believe the screws are M3x4mm with a 7mm diameter head. However you could also probably do just M3x4mm and use a washer.
Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.