At the moment, it's listed as:
Windows: 8.0.237 All necessary modules February 11, 2009 28.2 MB
...and links to: http://free.avg.com/softw/80free/update/f8all237ns.bin
(And I downloaded it this morning, manually)
The "f8all237ns.bin" is the dynamic part. The "237" in the middle has to do with the version number but there's no way to determine how much it's changed from last time. It could go from "237" to "241" next time.
(Granted, it's almost 2 weeks old as an update but if the customer is on dial-up, I'd rather get them 'almost' up-to-date then leave them a few months out. Hence, even if I don't need it, I'd rather have the most recent offline update available to me.
That's the whole point of Ketarin, right?)