I’m new here so go easy on me. Lol

Heres what I got. I put a Ej22 out of a 90’ Legacy in my Volkswagen Baja bug. I cant use the stock fuel pressure regulator anymore bc I’m switching all the fuel lines over to AN fittings. I had made some fuel rail ends that had a barbed fitting on them, and it worked ok for a while. But one developed a leak, hence the reason for wanting to switch over to AN fittings. 

It seems obvious right, an adjustable fuel pressure regulator from AEM or some other quality manufacturer is in order. But I’ve searched all over the web trying to see what is common and it seems like no one uses an aftermarket fuel pressure regulator. 
 

Is this extremely uncommon? Am I even posting this in the right place? 
Any help would be much appreciated!

We use them all the time on the turbo cars and other applications. I like the Radium Engineering and the Deatschwerks offerings. The EJ's use standard GM fuel pressure of 43.5 psi with vacuum/boost reference. 

GD