If you're bored and prepared to experiment, then you might be able to make the four cylinder one fit
You are always welcome to visit me.
Not sure why you'd bother with a sandwich plate given that the V6 has oil cooler lines direct from the block to feed the standard oil cooler anyway.
Someone I did know tried that and he blew up two oil coolers. So I thought that the oil pressure is to high if you connect the oil cooler this way.
But probably they were not the correct oil coolers or wrong modell.
As said, though, the standard oil cooler isn't a bad setup so why change it?
No it isn't, why would you want the oil temperature over more then 100 °C the optimal oil temperature is 80 °C
This setup is only for the eco shit emission, if the oil is quicker warm the engine emission are better.
If you always drive the speed limit never drive sportive, do not tow a caravan etc. then it will work, but if drive more sportive and faster (in Germany) then the oil cooler setup could be better.
Same as why people want to fit a spin on oil filter ....
Because it is a shit construction. if you are unlucky, you will not unscrew the lid but the whole oil filter house. And then you have a challenge to get it right again.