Stock radio model number

[HarryM]

Is there a way to tell exactly what the model number of my radio is? (other than pulling it out) I've been looking at ebay for a replacement. It seems all the radios have the same look, but a variety of model numbers. Would all of them work?

I've developed a nasty grating noise coming from mine, probably due to the disk that has been stuck in there forever. If I knew it wouldn't play it or give it back, I would have never put it in.

My expedition is a 2006 FWD Eddie Bauer.

Thanks