Journalist Working On Eastern Europe Philately Story

Hi all, I'm a freelancer based in Berlin, researching a feature story/nonfiction about the history of philately in the Eastern Bloc, and how it represents or influences the history and politics of the region today. If you have anything you think I may be interested in - from people and places to stories and hearsay - please don't hesitate to get in touch. Over the past two months I have been looking specifically at Ukraine and Moldova, but would love to hear about anything from eastern Europe. Looking forward to hearing from you, Sean