While the ICB do offer the CBS (credit bureau score) it doesn't mean that most/many/any of the banks are/will use it.
The CBS is based on your ICB report, so does not include some very important factors (e.g. affordability/ability to service the loan) such as your earnings, other relevant debt etc. etc.
I've no knowledge of the sector, but I'd suggest that trying to figure out what is a 'good score' is a futile exercise.