OT: Finding a mechanical engine fan by dimensions

Does anybody know of way to search for a radiator fan by mechanical
dimesions? Email to Dorman was replied to with a stern "no".

The water pump on my '72 Scout started to leak. Since the OEM fan
clutch is unfindable I decided to go with a pump that uses a bolt-
on clutch, but the clutch I ended up with has a larger bolt circle
and centering boss than the OEM fan.

The clutch I'd like to use has a four on 3 1/4" bolt pattern with
a 2 5/8" centering boss. The fan shroud is 19 1/4" ID, water pump
rotation is clockwise looking at the front of the engine.

Apologies for bending the "metalworking" concept, but Scouts are
mostly metal and I think I'm looking for metal fan 8-)

Thanks for reading,

bob prohaska