Joker,
You can go with an indash screen with DVD player built in like a Kenwood 910, Pioneer, or Panasonic. Those will fit in your factory location. Or on the other hand you can go with an Alpine indash monitor with a separate DVD player. There are tons of options to go with. It all depends on what you are looking to spend.
I just installed an Alpine 1006 monitor. I'm planning on getting an indash DVD player. As for where I'm going to put it, I have some ideas in my head.
Mike