The ship in "Trials and Tribble-ations" was a Greg Jein original. The general shape and details are of the original but the surface paneling is inspired by the TMP model, though all flush, while the TMP panels have a lot of thickness to them. Also all the colors are new to Jein, the original being green, purple and silver, but the DS9 one being a vaguely greenish gray and maybe some brownish copper areas? Also the lettering is in the modern TMP Klingon form rather than the old MJ angular script that appeared on the original model.
Check it out on Trekcore:
http://ds9.trekcore.com/gallery/albums/5x06/trialstribbleations247.jpg
I really do like the GJ version. I have a mind to alter an AMT D-7 to be the GJ version.
--Alex