On the results page, you could create a download form in the results row, you would need a hidden form element and a submit button. Set the value hidden form element to use the fileName column from the results recordset. Then add a Download File Behavior
insert -> Webassist -> File Manipulation -> Download if you have Universal Email 4 or Webassist -> File Manipulation -> Download in Form builder 2
Set the Folder to the folder that contains the files. Set the File field to use the Hidden form element.
Creating a download link on another page would be pretty similar, you just need a way to pass the file name into the download server behavior.