[There's an annoyed-sounding rumble on the other end. Something that might sound at home in the throat of a big cat, maybe.]

I'll keep looking, I guess, and hope I find something.

In the meantime, your friend? The scent doesn't have to be too fresh. If this Riku person had it on them or slept on it or something even a few weeks ago, I could probably still get a scent off of it, as long as it wasn't washed or nobody else used it since then.