Renzo,
It's great to hear that you will be going with the Dayglo colour scheme on your Jet Provost. As to whether it's red or orange, the picture that Amos Keeto has posted is an excellent guide; more orange than red, I would say.
You have also been advised correctly that XM478 served with 1 FTS at Linton on Ouse, and was never at Syerston.
Now you need a 1 FTS badge, not difficult I would imagine as they are still around, and still at Linton on Ouse...
Good luck with your project