What area do you live in Robert?
There's Des Higgins at Salisbury, Spikes Autobody at Salisbury, All Panels Restoration in Wingfield, Finch Restoration at Mount Barker. Most capable panel shops should be able to make the adjustment required and with care.
Might be worth checking if the hinges themselves need refurbishing, this can be checked by testing for upwards lift at the rear of the door.
Hope this helps!