Over time, I've found several websites that give operating instructions for various models of Zorkis. I believe the 2C, one of which I have, pretty well follows the 2 in operation.
As for an original instruction booklet, you might think twice, since there's a little language barrier. One Zorki 3 I bought on evil-Bay came with an instruction booklet -- in Russian. Unfortunately, I do not speak, read or write said language, which has a totally different alphabet (Cyrillic).