Editorial decisions ended in the Tang Amaya/The Mistress plot line being dropped and left unresolved, and the story that got published in Tales #34 was something completely different. Never-the-less, artist Scott Cohn completed the pencils for the cover and the first 9 pages, which he was kind-enough to share on his blog.
Here's the cover, though:

It's a shame we never got this story; I'm not sure why editorial at Mirage decided to kill it. Still, I'm glad to see the thread was eventually resolved in TMNT (Vol. 3) #25 and Cohn's art is always a treat. Check his blog for more!