The replacement for the LC1D1810 at 415 volt is the LC1D18N7.....comes with 1 N/O and 1 N/C auxiliary already fitted as standard.
https://www.clipsal.com/products/detail?CatNo=LC1D18N7&itemno=LC1D18N7&backto=/search?q=LC1D18N7&tab-document-1=0
https://www.clipsal.com/products/detail?CatNo=LC1D18N7&itemno=LC1D18N7&backto=/search?q=LC1D18N7&tab-document-1=0