To paraphrase The Road Warrior:
"You wanna know about the T-38? You talk to me."
To get you started:
Don Logan's book "Northrop T-38 Talon - A Pictorial History." - http://www.amazon.com/Northrops-T-38-TALON...523&sr=1-13
Warbird Tech Series F-5/F-20/T-38 - http://www.amazon.com/Northrop-F-5-F-20-T-.../ref=pd_sim_b_1
The Nasa Northrop T-38: Photographic Art from an Astronaut Pilot - http://www.amazon.com/Nasa-Northrop-T-38-P...0603&sr=1-1
Willy Peters Uncovering the NORTHROP (A)T-38 A/C TALON - http://www.amazon.com/NORTHROP-T-38-TALON-..._pr_product_top
Except for the NASA one (which looks sweeet), I have all the rest...the Don Logan book in particular having a lot of pictures of paint schemes you probably won't see ANYWHERE else.
There are no good 1/72 scale models of the T-38 available. Hasagawa made one a long time ago, and was one of their first models...but sadly, it's a really a misshapen F-5B. It's pretty bad, and the Chinese/Korean copies made since then are from the same mold and are just as bad. There is a 1/48 scale model around (Italari) which is better, though the cockpit is badly bare and the nose is too flat. Also, I think the scale is slightly off (like a 1/50th in actuality).
I have a few patches, though no spares of some of the unique ones. Also, a shameless bit of self promotion: http://www.talonhours.com.
FC