I'd imagine that a quick and dirty boilerplate repair would be achievable by any sheet metal worker worth their salt. Cut out the damaged skin panel with nice rounded corners, generously stop drill the cracks, drop in a flush repair panel, and put a 3-4 frame wide boilerplate repair panel over the top picking up on the existing fastener holes. That would be sufficient to ferry fly the old bird back unpressurized to facility where a permanent repairs can be carried out. There were aircraft flown out of the Balkans in worse shape. Aluminum structures are remarkably repairable.