I could find the valve cover gaskets for ES9 engine of Citroen C6 V6 3.0

PSA ES9 engine  is a very good engine. And it is also known as Renault LX7 engine.

However, this engine also has its drawbacks. This is because the ignition coil tends to fail and oil leaks from the valve cover.

Replacing the ignition coil with NGK's ignition coil U5008 will greatly improve durability.

However, the problem is oil leaking from the cam cover. In addition to the cam cover being discontinued, you cannot purchase the gasket alone. Cam cover ASSY is sold. Particularly bad are the left and right bank plastic cam covers (0248J0 and 0248J9). Looking at repair cases in Japan, most repairs are done by applying liquid gasket. RSUNO in Saitama, Japan posted an article on their blog about how they made a cam cover gasket.

Since I have distanced myself from the Citroen Special Shop in Japan, I looked for information on Europe.
Then I found a FB group called "ES9/L7X (PSA/Renault V6) owners and fans group."

Then, I found an article about Russian-made cam cover gaskets.
Following the link, it was on drive2.com: Russian version of Minkara (as I call it) .

I read the article and found the parts vendor, but sales have already been discontinued, I thought these reproductions and sales might be out of the question, even in Russia.
So I stopped searching in Russian and searched in French, and finally found the parts for sale.

It was a reasonable price, including shipping. I found it at a shop in Antibes, France: a city on the Cote d'Azur, between Cannes and Nice. Even though I say Antibes, I haven't actually visited there, but I've only been shopping via email...
However, although it is not a long story, it seems that this business cannot be made public due to licensing issues. If anyone is interested, please let me know in the comments section.

Quote: autocar.jp, facebook.com, drive2.com