HELP REQUIRED: Looking for family members of late Bimshamsir Pradhan from Gangtok

I am looking for the family members of late Bimshamsir Pradhan from Gangtok who left India and stayed in Sarawak, Malaysia. He went to Malaysia in 1961. He was married to Rohani (her other name is Pawi) and also have a daughter Lolita Bhimshamsir Pradhan. He was in Gorkha Regiment that went to Malaysia.