There are Smartshiedl bypass systems available (e.g.
https://www.ebay.com.au/itm/Delete-S...frcectupt=true and
https://www.ebay.com.au/itm/Ford-Fal...frcectupt=true ) but in most states it is illegal to sell or register a car without an Government approved immobiliser system and fitting one may mean it fails any future roadworthy inspection. More importantly it would also may it easy prey to thieves and void any insurance claim if it was eventually stolen. But perhaps a Smartshield bypass and a aftermarket club steering lock might be a temporary solution while you sort it. The ebay listing for the second one also notes "Note:-
will NOT work on SmartShield equipped AU1, AU2, AU3, BA, BF, FG or Territory vehicles" and the other one notes "
You will be required to send your ECU to our Office for Programming". So not a quick temporary solution either.