I just came across this publication byt the State Archives of Ukraine containing a list of available parish registers for towns in Zhitomir (in cyrillic obviously).
The link is:
http://www.archive.zt.ua/files/docs/kmk_t2.pdfIf any of the forum visitors can read cyrillic and provide a little more information that would be much appreciated by all. The locality index starts on page 534.