Ply may seem like a good idea but I doubt you will be very happy with the end product. I've seen many installs that way and have yet to see one that truly looked good except in cases where the existing dash was flat such as a truck or van. From the picture it looks like your cars interior is mostly plastic so a center piece in your dash with leather may look out of place as opposed to a painted piece that can closely match your dash. You may be able to bend wood slightly but it will still be very hard to match the existing dash with that method. Go over some of the tutorials found on this site for fiberglass. Although it takes more time the end result should flow smoothly with your car and it really isn't that hard. Just take your time and read all you can prior to starting!