Call handler data dump can do this:
http://www.ciscounitytools.com/Applications/CxN/CallHandlerDataDump/CallHandlerDataDump.html
as a side note you can also do a COBRAS backup and restore a collection of call handlers to different Connection servers - this is one way to replicate a collection of connected call handlers forming an application to multiple Connection servers - their relationships between them will be preserved (there's no need to import everything if you don't want - just selected handlers is legal).