HP-UX emulators for Linux?

Hello Linux folkz, Does somebody know about any good HP-UX emulator for Linux. I need to emulate somehow HP-UX environment on Linux box in order to test some HP-UX applications. Buying an HP-UX workstation is still out of reach for my budget :( Thank you in advance for any hints or information. Alex -- MS Windows users should be covered under the Americans with disabilities Act.