I have been having a tough time finding cable for my stepper motors. All the local places here have only 24 guage.Anyone have a good place to buy six conductor shielded cable in either 16, or 18 AWG? My steppers are 2.8 amps per phase, so I figure I need at least 18 guage wire I find plenty of four conductor,etc., but I need 6 conductors. ( help!)