Hi,
The CS737-200 Pan Am livery file that I have has an unusual file name (don't know why!) - 1334333786.zip
Let me know if you cannot find it online.
There's an interesting thread about the 737-200 and some CS732 liveries on page 5 of the following link, including giving credit to the painter of the poster:
http://www.sim-outhouse.com/sohforums/showthread.php?62733-Who-has-the-Captain-Sim-732/page4
Also, there's a nice YouTube video about this aircraft and livery here, plus it contains some links within the description:
http://youtu.be/7_bL-hyKxzA
I hope that this helps!
If you are new to the 737, check out the 737 thread as there are a few fixes for various issues, but also do consider installing the absolutely brilliant v-one speed gauge as this makes a huge difference, IMHO.
Fabio