You may find both "Deployment libraries shipped with PostgreSQL 8.4.3 installation" and "Deployment libraries built with MinGW environment" packages in the PostgresDAC Download area: http://microolap.com/products/connectivity/postgresdac/download/
Dump and restore libraries for 8.3.x and 8.2.x PostgreSQL branches are updated either in "Deployment libraries built with MinGW environment" package. They may be used with TPSQLDump and TPSQLRestore components, as well as with PaGoDump utility