Did you have a license to the older version of InDesign you are looking for, and did you register it with Adobe? Is it CS5 or Newer?
If the answers to both those questions are yes then you should be able to log into your Adobe account using the Adobe ID you used to register, go to Manage My Account and click on Plans and Payment > Products and find a download link. This will get you the the last issued installer, but you will not have any patches issued after that. If you have a backup copy of a patched version, running the downloaded installer and the copying the program folders from the backup is usually successful.
If you were not previously licensed and registered with a version from CS5 to CS6 you are out of luck.