Need info on pre-paid SIM cards in Indonesia (Bali)

Hi All,

I'm looking for someone in Bali who can explain the options for local pre-paid SIM cards in Indonesia for some research I am conducting here in Australia. I basically need to know what is available for purchase "off the shelf" regarding prepaid SIMs with credit already pre-loaded and a bit more of an understanding of these "plans".

I may require some to be sent back to Australia at a later stage and am willing to reimburse the helpful soul for their time and effort (as well as obviously cover the cost of the SIMs)

S.