The item I'm trying to find is the FM transmitter that Rose gave to me. I'm not even sure I have it here. The last time I definitely had it I was still living at Sanctuary, so it could be anywhere.
In the process of trying to find said transmitter, I found the battery charger that I thought I'd lost (I bought a new one recently from JB to replace it). I also found the rechargeable batteries that I thought I'd lost. :P