Your best bet is to pay the subscription for NIS 2004 so you can get all the updates for the next year. There isn't much difference between 2004 and 2005 and most reports suggest it is not worth upgrading to 2005.
That leaves you with Norton AV which PCWorld will not take back BUT Symantec will!
If you look on their web site you will find an address in Ireland to send the disc to with your receipt and they will give you a full refund.
I've just done it with Norton Ghost and it took about three weeks.