My upper unit's water leaking caused partial of my bathroom plaster ceiling damanged (around 15 sqf only).

The water leaking is fixed now but the upper unit owner told me that he could not find a affordable contractor for fixing my plaster ceiling. The ones he contacted quoted him RM800 (!!). He asks if I could get cheaper alternatives.

Any recommendation for such a small task on plaster ceiling? From my understanding the damaged part has to be cut off and replaced with a new one.

Location: Bandar Kinrara.