Best approach is re-search the files as you did originally to see if you can find any other sources for the files out there. However be warned there might be some fake files out there that never download.

If the file is an audio file, make sure it shows a bitrate in the search results. If it's a video file, do a bitzi search to see if it's listed & see other persons feedback on the file.
How to find music and How to use Bitzi Web Lookup are worth looking at.