OK, let's hope Rob's feeling generous.
The existing design of fascia is going to be at best very difficult to replicate exactly by machining so you're going to have to use a bit of artistic licence (but you don't need me to tell you that). In the small amount of time that I've managed to spend trying to come up with a good looking design I haven't managed to come up with anything that I though looked good enough and would still be reasonably easy & cheap to machine. I'm still playing though. I'll let you know if I come up with anything decent.