Since the HiPath 3000 series is largely considered "End of Life" (EOL), finding the software through official Siemens channels can be difficult.
Unify provides a migration path from HiPath 3000 to . The OpenScape Business Assistant (web-based) replaces the old Manager interface. While not identical, it can import HiPath 3000 configuration databases. Siemens HiPath 3000 Manager V8 R2.1.0 Download