Ranchhand makes headache racks with square tubing. I have one with bed caps and square rails that run all the way back to the tailgate. There is a picture of my truck on the Lonestar TDR website. There are lots of LSTDR posts having to do with the Texas TDR Rally this weekend so you can find their web address. Also, I will be at the rally if you want to take a look at my setup. I also believe that Ranchhand will be at the rally and they also have a website.