The panel file of IHDS waves 1 & 2 is now available at the ICPSR website: https://www.icpsr.umich.edu/icpsrweb/DSDR/studies/37382

Description from ICPSR: "This particular data collection merges the two waves of IHDS (known as IHDS and IHDS-II) into a harmonized pattern from the perspective view points of individuals, households, and eligible women. The data are presented in three different data formats: cross-sectional, wide, and long to facilitate a broader range of analysis options. "