After a pair or at the very least left hand black headlight covers that sit over the top of the back of the bulb housing. not sure what there name is
164 Headlight covers
I would call them dust boots, I may have some but probably can't confirm for a couple of weeks.
yeah no stress not a major rush just dont like sucking in hot air from engine bay into the intake
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i dont mean that actually sit on the headlight but rather above

Ah the curved black plastic pieces? I don't have any of those spare I don't think, they always break.
If you find a source let us know as one of mine needs replacing too.
mine mysteriously went "missing". i gather theyre quite a rare item
Maybe give Heino Nowatzky @volstretch a call as I think he has wrecked at least one 164...or try @iceton1975
I gave up and made some out of stainless steel.
sadly heino does not have any. i think i will have to make some
I'd be interested in a pair if you make some. Maybe something a little more durable - stainless steel, fibreglass etc.
I had a look on my car and they are present and intact. They look like a good candidate for easy copying in fiberglass. A silicon rubber mould would be easy if anyone wants to fund the silicone. After that the fiberglass is easy.
What sort of money are we talking about?
I have been copying a couple of items using Barns Pinkysil. It's about $80 for a small kit, and had a limited shelf life. It casts resin really well without shrinking or distortion. Worth it if a few people want a set, probably.
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i wouldnt be using anything i make. im certainly no professional haha. my mate has a 3d printer which could make a good copy @Ghettobird
I found a set last week.