WTB: T4? 1/4 panel or similar-v40186_640-jpg

looking for something like the above with the slots/grills
doesnt have to be a T4, thats just what I could find for ideas
want it cheap/free as its just for a experiment so can be damaged, any colour etc. as long as the slots/grills and a small area around it are straight.
ideally eastern suburbs melbourne, but happy to wait if I can get it from GAD or similar