To go along with my scratch-build thread on the Kurlan naiskos, here are all the best reference images I was able to compile.
Season 6 Bloopers
From the TNG Technical Manual CD ROM
Sternbach’s concept sketch
Photos Don Coleman (of MEL) posted in this RPF thread:
This is a replica said to be from the original mold, so the pigmentation and weathering are different than the screen-used object. However upon close inspection I also believe it was from a slightly different version made for production. It’s very close, but the mouth contours, size of the head, and height of the front decorative detail on the upper shell are suggestive to me of a different version.
From the book TNG 365
This appears to be using the MEL lobby version.