If you could be a little more descriptive, of which hole is broken. If I recall from the last time I removed the CCU, there are 2 screws at the top that hold the faceplate inplace and 2 tabs at the bottom above the radio. There are 3 screws that hold the CCU to the faceplate.
If it's one of the 2 screws at the top, you might be able to use a self tapping screw next to the old one or below it.