🚀 go-pugleaf

Or, as an option, the script can ask you to choose the folder:

if(app.documents.length != 0){
  var myFolder = Folder.selectDialog ('Choose a folder with images');
  if(myFolder != null){
      // reset the Find/Change dialog
      app.findGrepPreferences = app.changeGrepPreferences = null;
      // formulate a grep search string
      app.findGrepPreferences.findWhat = '@.+?@';
      // find all occurrence, last one first
      f = app.activeDocument.findGrep (true);
      for (i = 0; i < f.length; i++)
         {
         // construct file name
         name = f[i].contents.replace (/@/g, '');
         // place the pdf
         f[i].insertionPoints[0].place (myFolder.fsName + '/' + name);
         }
      // delete all @??@ codes
      app.activeDocument.changeGrep()
  }
}
else{
   alert('Please open a document and try again.');
}