OEM radio and cd changer question

I have a 2000 Toyota 4Runner Limited.

Does anyone have part number for the radio and cd changer that was available for this year? I know the head unit I currently have doesn't support the cd changer. So, I have to change the head unit and purchase the changer.

I know there are aftermarket options, but I hate to have someone smash my window for a radio. So, I will keep it all Toyota.

Thanks for your help!!!!