Do you not have a USB socket in the glovebox?
If so, you don't need any player as such, just a cheap Usb stick with all your music on.
Or, if you have a vaguely modern mobile phone, that can also act as an MP3 music player and can connect via bluetooth - which is how I play my music (I have all my music on my iPhone and the car plays it from there).
I suggest you need access to a teenager. There are lots around, if you don't have one of your own, they can usually be borrowed from friends