Louder and while slightly bigger it fitted straight on the old bracket with no modifications needed, oh and it's frigging loud enough to be heard from quite a distance, wait til I scare the heck out of them dippy grannies in their Nissan Micra - revenge awaits..... yay

It costed me �5.99 + �2.50 postage, this is where I got it from:

http://cgi.ebay.co.uk/NEW-FIAMM12V-C...QQcmdZViewItem

and here it is fitted to my bike (sorry about the dirt, I had to ride through a field last night to avoid a long diversion )