You'd have to remove the outlet. It's probably sealed in, so it's gonna take some serious Hulking out. But once you do that, a simple 1/8 to 10-32 adapter, and a 10-32 nipple, and you can attach the nv.
A couple things. One, the NV-55 can be mounted in either direction. Flow can go either way. Also, unless you use a stainless 10-32 nipple and Loctite (or some other sealant), it's going to be an extremely fragile connection. And if you do use the stainless nipple and Loctite, it's pretty much permanent. I'd do a WTB for the 10-32 stuff if nobody offers in this thread.
If it were me, knowing that I'll probably dump the simple reg within a year due to malfunction or frustration, or both, I'd use hose barbs and run the NV inline, and just tie the valve to something sturdy.