Nothing stops you from having an ARB bumper chrome plated if you want it done. There are also some places doing chrome paint that looks very similar, but for a bumper which is designed to be bumped you may be better off getting it actually plated, I'm not sure.
I don't think anyone sells bumpers other than tube-style that are chromed... www.roadarmor.com has a badass bumper selection and they'll paint them body colour if you want. I'm sure they could have it chrome-painted / plated for a price of course. The bumper starts at $959 in black though
Ask around local to you for somewhere that can chrome plate something as wide as your Jeep.
I have not seen a chrome bumper that isn't tube. Do what the others said (not the ones who knock on people for their taste) and see if yo ucan find a place locally that will chrome plate any bumper you want for you.
__________________ You can do things the right way or the wrong way.
Or you can do it MY way...which is like the wrong way, only faster.
I would imagine that you can get just about anything chrome plated. Just sandblast to bare metal and find someone to plate it. Of Course it will cost a friggin mint.
Have you checked out the diamond plate bumper covers? Pretty Bling and d-plate is more rugged than chrome. mypartscar.com has them for front and back bumpers. not my style but whatever floats yer boat dude.