Looking for plugin for drop-down menu for multiple download options

Hi all – new here… I am hunting (and hoping that it exists) for a plugin that would allow me to provide multiple options for a file download in the form of a drop-down menu.

For instance, I want to deliver a PDF of a piece of music, but I would like to have it in multiple keys. I would like to be able to have each option quickly available within a pull-down menu that would then link up to the downloadable file.

Is there anything like this out there already? I’ve spent quite a bit of time looking for it, but to no avail… am I wasting time?

Thanks in advance!