ya man...get a Xena disc brake lock with alarm function...i'm using one of those, and it's loud man! :-) the construction of the lock is sturdy too...

i got it from David Choo, a reputable seller on malaysia's various bike forums....just search online....tonnes of stuff man! Jackets, boots, etc...and Eidaman at Kelana is not bad too! frenly owner and wife, will help u source for things...:-)

happy biking!