I have these on my car and love them. They look awesome. Makes the motor look like a big block 6 if there ever was one. Check out the Pics from my toys link.
These do not leak a drop and seal is perfect. Here is the link and yes they do sell them. Scroll down the page from the link and you will see the Black Krinkle with the Turbo 6Logo which is what is on my car & looks awesome I think.