I sent you an email on a company that sells kits.
There might be other options out there.
** Kids -- do not try this un-supervised ***
Standard 12 volt CPU fan with low revs.
Hook up to 12vdc and AMP meter, turn on supply.
Running fan: Supply 10.5vdc and AMPS 0.16
Blades stopped: Supply 10.0vdc and AMPS 0.20
