Razamanaz
You don't need any specific Cyrillic fonts for Pages, virtually all OSX fonts have Cyrillic.
Just set your keyboard to whatever Cyrillic language you are using:
+System Preferences > Personal > International > Russian should already be in the list > Move it to the top of the list+
If you need any other keyboards:
+International > Languages > Edit List… > check the languages you want+
For more quality Cyrillic fonts, any of the major font publishers' Open Type (otf) collections will do, with Parachute Fonts particularly specialising in Cyrillic with suberb designs.
Peter
See:
http://www.freeforum101.com/iworktipsntrick/viewforum.php?f=14&sid=3d013ab4ee177 305f19c2d7802f0d2c1&mforum=iworktipsntrick