We've got plenty of sources, and with the color correction specialist, they know how to adjust the colors to approximate the originals.
We have laserdiscs, VHS's, and bootlegs of the film versions.
See this thread for more samples.
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http://originaltrilogy.com/forum/topic.cfm/Star-Wars-Colortiming-Cinematography-was-What-changes-was-done-to-STAR-WARS-in-93/topic/9805/
There are many samples of them there. Some are listed
in post 4 of this thread:
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Here is a sample glue frame from ESB. Not sure if it is in all the versions.
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The original 1080p frame:
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http://img198.imageshack.us/img198/1738/phpb.jpg
There is no thread for these, like there are for Star Wars:
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http://originaltrilogy.com/forum/topic.cfm/Star-Wars-Tantives-Orange-Items-Thread-other-unintended-objects/topic/13355/
Team Negative1