Currently looking into creating my own red gauge faces too. It's easy enough if you have the time.
DIY gauges consist of 3 layers. The front layer is the coloured face, printed on transparent overhead projector film. The middle layer is extremely thin white diffused plastic that you can find on paper folders. The rear layer is another version of the face on transparent overhead projector film, but this time totally black aside from the areas that you'd want light to escape from. Very cheap to do, and obvious gains from doing it.
I'd be designing with the non-italic numbers (which are actually the front 'DDT'). Saves buying them from Porsche for around £300, when I can do it myself for around £20.
Will probably do it the same time as the LED's I'd imagine. I'd try it with mine first, and if it goes well, I'd be happy to design and supply to others.
Spent some time today re-creating the dials from scratch in Illustrator, so they're vector based.
They're not accurate until I get scans of my actual faces, but I can tweak them to fit when I do.
Ones I've made so far:
GTS 01 (my favourite):
GTS 02
GTS 03
Boxster S
GT4
Just need to take apart my gauges, scan the faces, re-create them accurately and do a test print to ensure they're correct, then print and create them!
I think this with the LED overhaul in the interior would make such a difference.