Steve,
I do not have a WC torch to test my hypothesis, I am running a #17 (150A) on a Lincoln Precision 225 (transformer/rectifier).
A small fan with an output necked down to the water input hose of the torch is all you would need.
The neck could be a long narrow funnel made-up with your choice of material.
If we eliminate the water cooler and coolant we could save $500 to $1,000 in equipment cost, and of course welding system maintenance cost. The fan and neck could be sold as an aftermarket component group for low cost, and still make a profit.
Wob
WOB
Lincoln,Precision TIG225
Miller,Millermatic 251
Miller,Spoolmatic 30A
Miller,Millermatic 130XP
Miller,Spectrum 625
Miller,Thunderbolt 225AC
KMG,Belt Grinder/2x72
Ingersoll Rand,Compressor/5HP
MSC/Vectrax,Band Saw Horizontal-Vertical/7x12