Looking for a Non-Alcoholic Root Beer recipe

Didnt know where to post so I'll start here.

Looking for a NA recipe. Couple points:

• I've never attempted to brew, but have a general understanding of how to. -Looking to make 5 gal batches, preferably
  -Not opposed to a syrup recipe as I have access to soda water near by. -I have access to draft system, understanding that I'd have to force carbonate if I go this route.

I currently have a local root beer on tap so but was looking to venture into creating my own blend.

bon appetit