Online is your best bet TBH as most people dont stock ones for the JDM with the different terminals. If you want to stick with JDM I cant remember what size it was but I changed mine for a uk battery which was a 005L but you need to swap over to UK terminals aswell.
Hey Dblock
Quick query any reason why you switched to UK battery? and the 005L the same size as jdm one?
Saskhi
I switched because at the time it was being left for short periods of time and it kept dieing. I know the battery was on its way out but it felt like it used to crank over and no more.
Also the UK battery was same price as JDM, better availability, bigger much much bigger. My JDM was 330cca and this one is about 5-600cca I'm sure so, The 005L is a UK sized battery. I needed to switch the battery terminals but thats it. Also if the JDM battery lost say 50% of its charge then it would struggle where as now the battery seems to last for ages!