Sorry to hear your bad news. Shortcut options to getting back on the road without too much trouble and expense would appear to be:
Find a completd 2nd hand VVC engine to swap over. Just an engine would be quickest but depending on availabilty buying a complete damaged donor vehicle.
Find a 2nd hand VVC cylinder head and fit with new gasket, belt etc.. Best check state of your pistons for heavy collision damage, likely to be fine but worth checking.
Downgrade to a complete MPI engine. Ive seen Mgfntfbitz have one from an auto for £ 400, has the better 135 cams fitted and being sold with matching ECU.
Etc