Hi Michael, you may ask for sample of shielded twisted cable from Chinese manufacturer, many factories are interested in involvment in your project from the very beginning, the normal telephone cable is not the best one for EMI environment, for us, we use the shield cable for our ultrasonic wind or wind sensor, by the way, if you need ultrasonic sensor (transducer), we may be your help, good luck.
contact me at [email protected].
BR
Bruce