What would you like to replace it with? Any of these will work
https://www.tlc-direct.co.uk/Main_Index/Door_Bells_and_Chimes_Index/Door_Bells_and_Pushes/index.html
https://www.tlc-direct.co.uk/Main_Index/Door_Bells_and_Chimes_Index/Door_Bells_and_Pushes_2/index.html