It seems Daewoo Buses have folded in Australia.
Thier website does not seem to work anymore and found a notice of proposed deregistration on the ASIC website https://insolvencynotices.asic.gov.au/browsesearch-notices/notice-details/DAEWOO-BUSES-AUSTRALIA-PTY-LTD-604149055/5b7f1d77-5cb9-442c-9bde-e88b731a4be7.
Seems they may of gone broke.