Illustrator Scripting :: Find And Replace Script Using Info From File Name?

Is it possible to write an Illustrator (CS4) script that would find and replace 2 instances of text using the actual file name to supply the changing text?
 
Our current file naming system uses a Part Number, Catalog Number and Run Date. (example: 123456_ABCDEF_2014 JN)We are currently saving a master file as the new Part Number and simply doing 2 separate find and replace functions for the Catalog Number and Run Date. Unfortunately we have over 500 parts to change and thought we could narrow down the 1000 find and replace to just 500. Although this may not appear like such a time saver, the key factor would mean entering the changing data just once per file, minimizing errors and eliminating proof reading the actual file.
 
Here is what I have used for a simple find and replace script, but I cannot seem to find any information to connect the file name data.
 
[code]

var active_doc = app.activeDocument;
 var search_string = /ABCDEF/gi; // g for global search, remove i to make a case sensitive search
var replace_string = "GHIJKL";
 var text_frames = active_doc.textFrames; 
var search_string2 = /1234 XX/gi; // g for global search, remove i to make a case sensitive search
var replace_string2 = "5678 YY";

[code]....