Should be able to scrounge up a metal fan from the local junkyard. IIRC, some of the older Foxes ('79 to '84?) had metal fans, and the four-bolt pattern is pretty generic, so you could also probably salvage one from a totally different vehicle, just so long as the clutch will bolt in there and it's not larger than your stock fan (around 18", I think). I would suggest a fan off an 80's Crown Vic or Town Car, being that they're also a 302 and would have the same water pump hub bolt pattern/size, but I'm pretty sure those fans are too big around, as the radiator in those cars is significantly wider/taller.
Hayden used to have an 18" metal fan, reverse (counter-clockwise) rotation for sale that would fit a stock fan clutch, but Autozone doesn't list it as being available, anymore, for some reason. It's probably still available online through some other places, though, I'm sure. The part numbers for all the different flex fans and standard fans are listed on the back of the box of any flex fan at the store - just specifically look for the reverse-rotation clutch fan.