Antivirus program that can run AV updates offline

Helo Experts,

I am managing a low Internet bandwidth environment and need a good solution for downloading AV (Antivirus) updates. Say I have 10 computers on the my LAN.

Does anyone know if there is an Antivirus program available that will:

1. Computer 1 gets its AV updates  from the Internet.
2. Computers 2 through 9 get updated over the LAN from Computer 1.

In other words only one computer goes out to the Internet for updates.

IS there a product available to do this?

Thanks!