I am in recovery Brune, and my Drug of Choice was Miller Lite.
Personally, I would not want to start drinking "NA" beer because all of the rituals that went along with my addictions came with it.
Freezing the glass, putting the beer in a cooler, covered but not full of ice, reach in the bottom for the coldest beer, pop that top, smell that beer, pour slowly in cold glass, take a sip, then pick up the pace over the next 6 beers until I feel comfortable.
So, yes, he can drink orange juice, why drink a fake beer at all?
My opinion is you are getting on the top of the slide down a long slippery slope.
"Look at me Ma! No alcohol (except a little).
And, if he decides to switch over, it will smell the same, but you will question your sanity. He will be drunk and denying it. I experienced that with my ex.
It is not a good idea, not for an alcoholic.
Beth