Suzuki hasn't printed a newer manual because there isn't a need for it, as I explained when I stated the differences between a 2001 model and a 2005. Ron Ayers' page doesn't list the supplements that are available, but you may be able to source those from them with a phone call, or from another Suzuki dealer. I know there is a supplement for the naked B12's that covers what is different on them from the "S" model, so I'm going to assume there's a supplement available that covers the minor differences (mostly a new wiring diagram) for the 2002 and 2004 minor changes.
FWIW - Ron Ayers does indicate the 2001 service manual p/n is a superceding part number, so it may inculde updates.
For 99.9% or the work you would ever do on a 2005 model, the 2001 service manual - without supplements - will suit you perfectly.
As for shipping taking a long time to get from the UK to the US... I don't think so. I have ordered a parts CD from one of those E-bay sources and my CD was here in a week. I have also ordered hard parts from UK sources with similar results.