Yeah - it would be nice if the midi clips weren't so invisible to us, but for me I generally don't have a giant bunch of midi clips for the same section in a song, so I don't have much of an issue with having to locate a particular midi clip.
And to the original poster: I understood the question as being on locating an audio clip when you have an idea of what is in the clip's name - and I don't quite get what wouldn't work in finding them by searching the audio folder, since they are all listed by name there.
Bob Bone