Replacement OEM Radio/CD Changers?

Are these still available? The 6-CD changer of our 12 year-old head unit just gave up the ghost and I'm looking at a potential replacement. Do they offer an OEM head unit with just a single CD player?

If not, any suggestions on the best aftermarket head unit that doesn't look like an ugly zit on the dashboard? I would also like to connnect my iphone as long as I need to pull out the head unit.

Thanks!