95 Mercury Grand Marquis Radio Swap

I bought a 95 Mercury Grand Marquis GS with 40,000 miles and I love the car. But it has a factory AM/FM Cassette Player. I would like to swap it out for a factory AM/FM CD Player radio. From what I can tell, the CD Player was not an option in 95. The radio has the four pins for removal. Is there a factory AM/FM CD Player radio that will swap? Thank you.