While doing research for my TOS bridge displays project, I came across this forum and decided to say hello.
I too am disheartened by the seemingly lack of reference material pertaining to the bridge display graphics. I am familiar with the Captains Chair CD and the Okuda recreations but wanted to reproduce something close to what I've been looking at for all these many years. These are after all, just someones interpretation of these displays, not attempts at authentic reproductions.
I did read one time about a possible book being co-written by Jim Rugg's son (I can't remember his name)that would have shed light on many areas of the bridge set. Apparently Mr. Rugg kept detailed notes and drawings of all the circuits and mechanisms on the bridge set. He kept wiring diagrams and copies of all the bridge graphics as well as several copies of the radial pattern used for Spocks scanner. This was in the mid 90's, but I don't think it was ever completed. It's a shame this info was never made available to the fans.
Now for the shameless plug...

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I have put together several Flash animations of the bridge displays in my attempt to recreate the actual look of these displays in action. They can all be seen at
http://tap364.webs.com
I look forward to being a forum member and hope I can contribute in some way
-Troy