Where does one buy the plastic/glass rods that hold the door of a fire
alarm in place?
Go to your local glass shop and ask to purchase rods (most will stock
ones with varying diameters so it's a good idea to take a sample with
you). You can cut them to the right lenght with a set of wire
strippers. This beats paying the exhorbitant price for pre-cut rods you
get from the manufacturer.