Does it have to be a Jeep? I'm a big fan of the Suzuki APVs, you can usually seat 8 people and they're cheap to run.
Here's a selection on sale now in Bali, maybe not so helpful if you haven't got an Indonesian speaker to help you out though:
http://olx.co.id/mobil/bekas/suzuki/bali/?search%5Bfilter_enum_m_tipe%5D%5B0%5D=apv&search%5Border%5D=filter_float_price%3Aasc