I recently replaced both sides for new and sprayed using a can - due to the small size one can achieve a good finish.
Expensive for what they are when buying new but the screw holes take a lot of stress; buying second-hand could be a good bet or it may be a bad one on the basis that the stressed screw holes are on their way out already.
The screws are lightly torqued and from memory the max torque is 2.5 nm (but do check this - it is in the workshop manual)