The fall of the Iron Curtain in eastern Europe made it easy for the Saxons to emigrate to Germany, where they have the right of return.
For current contact (any ethnicity), check the on-line phone directories.
If looking for a specific Saxon family, the best strategy depends on the when and where of your information. Most of the Saxon villages have a HOG (Heimatortsgemeinschaft, a social group for former villagers; many have a website or at least a mailing address. Check at "Siebenbürgische Zeitung Online" for contact names).