if u want a quick fix, go to davis guitar or guitar connection at peninsula/excelsior and ask them for the screws.
better to bring ur guitar to make sure of the size of the screws..
they will charge you a few bucks for the screws, i think.
if u want to save money, bring ur guitar to a hardware store that sells screws and slowly find suitable ones.
they will charge u a few cents for the screws.