The Polish Air Forces Association and the Polish Institute and Sikorski Museum, both of which can be contacted via telephone and 20 Princes Gate, London, will be able to provide contact details.
When in Warsaw you MUST visit the Polish Air Forces memorial, which was opened a few years ago and is a fantastic piece of architecture with a surrounding wall containing the inscribed roll of honour. Incidentally, it includes those Poles who fought with the Russians!
Old Duffer