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This may save someone a few bucks one day:

AJUSA 77018900

AJUSA 77018900 Oil Cooler Gasket | RockAuto

It's the gasket for the thermostat/oil filter housing. I am still looking for the thermostat itself. I'll update if/when I find it. Beats buying a new part for $400+
I just replaced the entire oil filter housing on my Q7 due to leaks. This gasket could have possibly worked instead of the entire unit.
The thermostat is hard wired directly to the housing and can not be replaced separately. ( I tried to use my old OEM one instead of the unit that came in my replacement Vaico oil filter housing, but it was wired in and the wires pulled out when I attempted to swap out the thermostats).
 

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Discussion Starter · #3 ·
I can confirm that the thermostat is wired in. Shoot.

I've ordered part # 059115389H. It's a discontinued oil filter housing, which has been superceded by part # 059115389P. $110 @ecstuning vs $400 @VW for the new one.

Looks like I'll have to pull the old oil temp and pressure sensors and put them in the new one. Hopefully it fits or I'll be spending another $400 😂😂😭
 
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