Story Damo,
You can get one off Suped, which is the one i got. Very tricky to put together and ok quality. Cost me 70 euro. Saw another one on icebuyer for 45 euro
The one i got is interchangeable so u can fit a single din or double din headunit, or change it around if you every buy anything different
What model do you have? If its an Altezza rs200 with the external amp behind the glove box, its not a straight forward install for the new HU