If you're going to try using a resistor to drop the voltage, remember that the max current is 0.6 amps/phase. Since there are 2 windings (phases) when both are energized each will draw 0.6A for a total of 1.2 amp. So you'll need a 12 ohm resistor at 12ohm * 1.2A = 15 watt resistor.
Mouser electronics lists wire wounds like this for as low as $0.64 US. http://www.mouser.com/