File That Points To Another File In Smart Collections

I know the title sounds strange, I'm still open to suggestions as to how to tackle what I'm trying to do.

But basically, I wanted to do a workaround to write metadata for some file types, namely, I wish to add keywords and some notes to audio files or file formats that don't normally support them.

And I thought that I could create a file with the same name as the file I'm interested in, but append "-meta" at the end. So I'd do something like:

- MyMusicFile.mp3
- MyMusicFile-meta.jpg (still checking which file format has the best metadata compatibility).

And edit the "-meta" file information accordingly, which works well enough for my purposes. The only issue with this, is that if I make a smart collection that targets the information for the "-meta" files, the non -meta file won't be added (as expected).

My idea was that I could add this as a custom script to enhance smart collections, that upon finding a file named "-meta" before the extension, it will look for a file in the same directory with the same name minus the "-meta" and add it as well (so, also include the -meta) to the search results.

I tried checking the documentation to make this script for this over at: BRIDGE DEVELOPER CENTER but all SDK links are dead, so I'm unable to check if this is feasible or check an example to work with. Can anybody point me to at least a starting point?

Thank you