Does anyone know of comprehensive car insurance in Bali ??

Same answer as for your other question:

Kenny, welcome to Bali, and welcome to rule #1 when it comes to tamu driving here.  No matter what, if you are in an accident here it is automatically your fault.  Why?  Simple, if you weren't driving, the accident would have never happened.

Forget everything you know and are used to regarding automobile insurance, collision and liability and personal injury. 

The locals are not suckers for the game of automobile insurance.  In fact, about the only time they may have any auto insurance coverage is if they buy a brand new vehicle on credit, as the credit issuer will require collision insurance which will only cover the purchased vehicle.

If you are in an accident, you will be held financially responsible for any property damage as well as any medical expenses for injuries caused by your accident (again, which is automatically your fault).  God forbid the worst…a death, and you are on the hook for the cremation ceremony as well.

For many of us, all of these stark realities are the reason why we don't drive ourselves.