Since we started dev on these things a long time ago things have changed. You can buy the NISMO 555s/740s or PE850s. Any of these will fit into the '95 injector bore either natively (NISMO) or with the collar (PE). In actuality, we'll be offering a rail that's suited to the PE w/o the collar (Sard style) in the 3rd batch of production parts.
Later
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the universe." -Albert Einstein
When was the last time you *really* did something with your Z to call yourself a Z enthusiast?