Procedure in case not able to find the original will for partiton

My father in law, hindu by religion expired last month leaving behind his wife & 4 daughters. He made a will in 2004, a self attested true copy of which he had sent to all his daughters in 2004. According to the will, he registered 250 yards of plot each to his 2nd & 4th daughters. They have constructed their houses on the said plots in 2007. After his & his wife's demise, the house he lived in is willed to his 3rd daughter, i.e my wife. His eldest daughter is willed to recieve bank funda after his & his wife's death. No landed property is willed in her name. We are not able to find the original will, except the self attested true copy that my wife has with her. Please advice