HI Kira,
To me it's not clear what your question is. Please make it some more clear.
If I understand you right you have an old C10 with a problem in it's mail flow.
Or.... are you trying to re-use a C10 for Mail Flow Central (MFC)? And are you seeking the MFC software? If this last is the case, to things:
1) You loose your warranty and support on the C10 if you install an other OS on it. (Besides the fact that Ironport appliances do not have a video card installed, which is needed for most OS installations).
2) You can get your MFC software via your sales contact.
If I totally misunderstood you, please clarify your question.
Best Regards,
Steven