Unfortunately parts for these cameras is non-existent from Google direct. Most people need to purchase used cameras to get the parts or find parts from various third parties (Amazon, Best Buy, etc).
However for screws, you may luck out spending some time in the nuts and bolts section of your local hardware store. I think the screws are M3x4mm with a 7mm diameter head. However you could also probably do just M3x4mm and use a washer.
