So I noticed after a few days ago that my right headlamp assembly had A LOT of condensation / moisture inside. The inside of the lens was completely covered in water droplets. The solution to this typically seems to be opening the whole headlamp assembly and re-sealing it, which I wasn't looking forward to!

Then I remembered that I had recently attempted (and failed) to replace the little "marker" lamps inside the headlight cluster, and the timing seemed suspect. So I opened the hood up and lo and behold... there's a funny t-shaped rubber pipe that I remember removing during my aborted efforts to replace the bulb, and it's MISSING on the side that's getting the condensation! Not sure if I forgot to re-install it or if it just cracked or slipped off afterward. (I remember thinking the rubber felt dry and brittle.)

I looked all through the service manual and there's no mention of this little gubbin, nor does it have a part# stamped or molded into it. Based on the design, it seems plausible to me that it probably plays some role in preventing condensation, and it would certainly explain why I'm having this issue now. Anyone got any ideas where I could source a replacement?