I suggest that you contact 'The Together Plan', a charity, based in
the UK and Belarus, which among many other projects, has a genealogical service.  As a way of helping Jews still in Belarus becoming used to earning money if they provide a good service, they can do genealogical research in Belarus on behalf of people in the West.  Their huge advantage is that they know the languages and understand the various bureaucracies.  
Do check out their website:-  www.thetogetherplan.com   What We Do

Margaret Levin
London UK