LoD makes a full bumper with carrier that can hold roto pax. Also or-fab has a carrier with rotopax or jerry cans. Both are great options. If you don't like either of those then you can get a genright or Evo carrier and attach a rotopax can to it. You can see a great example of it on the adart jk (genright carrier) in the past two jkx's or on rubicat (Evo carrier) in the 2013 jkx
I have the LoD shorty rear bumper with door linked tire carrier. I don't personally have rotopax, but as for the rest of the bumper I can say it's awesome. Looks great, and having the door linked carrier is very nice