Proffitts does a role cage for 60s, and it looks like you can ad a cargo barrier. Expensive probably, but they are in CO and you are getting two cool things at once
But other then that, for 60s I have only seen that cargo barrier and the Milford ones, do a search on here for Milford. Should show up. There are generic ones from Cabelas and others, but not sure if thats what I want if I wreck and have a cargo area full of gear.
Roll cage not in the budget right now. But who wouldn't want that.
Looking for something vehicle specific. Don't want the universal fit type. Too big of dog. If it don't fit right he will probably remove it. Plus most use a threaded jack system. Won't be very kind to the headliner.
Spend the coin on the Milford. I think it is one of the best additions I've made to my truck. I tried to use one of those cheaper versions linked above but my dog would literally tear it down in seconds and be in the passenger seat before I could get from the tailgate to the drivers door. The first time you hear a tool box of something heavy slam into the Milford, you'll be glad you bought it.