A-37 Dragonfly?
2 Engines, 2 sets of eyeballs, Max. of 3,000 lbs. including one GAU-2/A 7.62mm Gattling gun and additional gun pods, high-explosive bombs, fire bombs, rockets and/or missiles.
Can't be too expensive either, are there any left?
Or maybe use it as a base for a new, low tech, cheap version with better payload and power for today guerrila skirmishes?
Give it rough field capability and a bigger payload with some armour and it would be a nice poor mans A-10.