Based on this product's specifications, here are some alternatives and similar models
Flush button RAVAK X01455 for concealed cistern (model X01455)
Summary description:
RAVAK X01455 is a flush button assembly designed for use with compatible concealed cisterns. It provides a wall-mounted actuator interface for initiating toilet flush cycles. The unit is intended as a replacement or spare part matching RAVAK installation points and fittings. Suitable for residential and commercial bathrooms where a concealed cistern and separate actuator plate are used.