I have a Streeter Amet Vehical counter model 161-2 and am looking for the outside plug/cord for road application. This is a older model serial number 3911 and has a three prong male recepter to the main machine and takes two 6 volt batteries. Could you please see if you still have the cord available and the cost of it. This is for the Michigan Dept. of Natural Resources Parks and Recreation Division, Newberry, Michigan. Thank you for your time