If your existing panel is structurally sound and you have a bit of carpentry skill and tools, there are thin materials that can be glued to the old panel and then cut out where needed. I have seen the carbon fiber type and I thought they looked pretty nice.
Here is a link to one company that sells the panel material and also has some information and guidance.
http://www.protechcomposites.com/thin-sheets/
There are companies I have seen at boat shows that will make a custom panel from a drawing or even better from your original if it is one piece
You should be able to find a few of theses companies on the web.