Pinkytoe - I suspect that's "exactly" what's up with mine. Let me know how you make out. Would be amazing if the internal parts were common. I may just be interested. Hate to buy a replacement one if some creative disassembly/Lego work will get me there too...
So I
finally got around to doing this last weekend! It's pretty simple, as everything is accessible simply by removing the clear plastic from the headlight.
Put the headlight in the oven at 220 for about 10 minutes. This should be about enough to get the clear part separated...if not just put it back in the oven for another few minutes and try again.
The broken piece will be here (no, you don't have to remove all the innards. I didn't take pictures in the process so I'm showing it on my spare stuff):
It's easy to get out, requires a little bit of careful leverage to get locked back in, but it can be done.
This is the offending piece:
Once done, put it back in the oven for another 5 minutes or so to get the goo hot so you can scrape it out.
This 3M window weld stuff fits back in the seam perfectly (and I believe is the same compound as the original... apparently the VW guys use it on their headlight reseals
):
https://www.amazon.com/08612-Window-Weld-Round-Ribbon-Sealer/dp/B000CQ4AOO
I got my locally at an advance auto, so you don't necessarily have to wait for Amazon.
That's about it!