Alex checked two sources that Miriam Weiner lists on the Routes to Roots website: the 1865 Census for Labun (Fond 118, O14, S 79) and the 1816 Census for Polonne (F 118, O 14, S 118). The second volume contained only Christians, no Jewish people. The first contained only four jewish families from Labun:
Durfinkel (or Garfinkel), Feivel son of Schmuel
Lubarsky, Pesach son of Itzko (wife listed but name not readable)
Brodetsky, Michel son of Berko
Bernshteyn, Srul Lipovich
We also checked Fond 118, O 14, S 14, 113, 114, 116, and 317. They contained Labun records but only those for Christians.
There are a few additional record sets mentioned by Miriam Weiner's website. These will have to be checked after I return to the States.
After the archive we headed to Kiev where we will end our trip with several days of tourism.