lots of these switches end up crushed in busses at the junkyard all the time.. id look around for a truck / bus junkyard if you arent looking to buy new. if looking to buy new there are lots of places that sell them but they arent cheap. I havent seen a switch for a bus that has a separate park position on the switch, the motors typically have one of a couple different park mechanisms built in. from what I have seen it looks like the Amtran / first gen IC. conventionals use the same wiper switches as the flat nose. some busses have 2 switches others are a single switch to control both motors (the switch is often a 8 wire for the double motor control. some of them have a sepasrate wire for the ewasher pump.
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