OK, now that I know what to look for, I found it. Mine is a bit less inconspicuous but you really have to look way under the car to see anything. I also had the advantage of a straight shot, once past the 90º elbow going straight up into the heater, so I could use just a rigid length of exhaust pipe out in the open with no need for insulation. I think I anchored the far end to one of the front bumper mounts.
I ran mine out to the passenger side because the heater air inlet is on the driver's side, right behind the headlight bucket, with a shelf installed for protection. Using a left/right air cross flow keeps any combustion exhaust from finding the air inlet.