All the GM twist
(and thumb) throttles use a 5V hall sensor to control the throttle signal output, the 24,36 or 48V voltage rating is just for the battery gauge, so just use one of the ordinary twist throttles but don't connect the battery feed wire for the battery LED gauge/light switch.
You only need to use the ground wire, throttle signal wire and the +5V supply for the throttle to work.
Alan