Where can I find out more about the Shi'ido?

I've thought the Shi'ido were the coolest alien race I've ever seen since I first read about them in "The Essential Guide To Alien Species." However, I haven't been able to find pictures of them in their natural form or information about their culture, anywhere. If anyone can help me out with this or any other info about them, it would be greatly appreciated.

Thanks in advance!

 

They have an entry in the Alien Anthology that Wizard of the Coast made.

 

And then there's the galaxy of fear books, if you aren't too embarassed about picking them up...

 

Galaxy of Fear, that Anderson/Ralph McQuarrie "worlds of SW" book they did together, and WEG had a feature on them too IIRC.