You can always buy a Kenwood Deck, I have a higher end model, but they all should play MP3s, you will get the best sound for your money with Kenwood. They look pretty nice in a contour The model I have is the KDC-X659. It was the best they had out at the time, got it for $475 before tax, now its about $300, Kenwood also has a deck that is for about $150, that will also play MP3s.

95 SES Sold 99 SE Sport Sold 99 SVT T-Red Tan Interior. K&N, Magnecors, 19' Theorys, And some audio stuff.