This one just sold for 450k...fit a basic manpad defensive suite...rewire the ordinance stores and fit serviceable cannon and gunsight...maybe some modern armour...4-6 weeks tops.
http://www.courtesyaircraft.com/
Click on 'inventory' and go to AD-4N
Fold the wings and wheel it and 5 of its siblings into a C5 or AN transport...fly to Kabul, wheel them out, fuel and arm and airborne 30 minutes later.
I reckon in a week the Harrier mates would be lining up to be checked out
