Anti Virus support for RH Ent. 4.3 / 4.4 on Domino?

I am looking for an antivirus program for Domino R7.01 that supports RH E. 4.3.

I am finding some that support RH enterprise 3.x, and when I inquire, get told, “well, we support 3.x, but that’s not to say it doesn’t run on 4.3…”, and that 4.x is not supported yet. (With no timeline on when that may happen.)

Anyone out there running Domino 7.x on RH Enterprise 4.3 or 4.4? If so, what are you using for anti-virus?

Also - have any of you tried running the OS version of the antivirus on that platform, and would I be able to trap viruses in the mail.box configured that way?

Any suggestions, insights, gotchas, etc. would be most welcome.