As mentioned in a similar thread we only really ever had a couple of confirmed concept art floating around at the time - other than the poster which was linked to yesterday the only other concept pre 3.5 stuff is as below...
This is just the RD of course - is this the kind of thing you were looking for?
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loginThere was also this one floating around from the artist who worked on the conceptual for a while but how accurate this one is in consideration I am not certain.
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