Nice EV you got there!
This weekend I am actually going to make a blower cooling system for my 6.7" ADC motor so I can too drive dirty! I ordered a 170 cfm 12 volt blower off eBay for $26 including shipping and it should be here Friday. It's used to cooling brakes for NASCAR so it should be up to the task. I am then going to make a new grate for the com end of the motor and make a duct to connect the blower to the motor. It should be a real cheap solution and I plan on getting the sheet metal for the new grate from my local ACE Hardware.
I'll be posting my blower design on my site when I am done.
Civic Electric Car Conversion