Thought I'd report i've found a good supplier of ipod betteries for anyone in the UK.
www.advancedmp3players.co.uk are selling Sonnet batteries for £24.99. I've had very good experiences with them befor, although i've never bought a battery from them. Very good service IMO.
...also, something that came as a surprise to me, the only review was by someone with a h340 who linked to my guide here lol.