The rock sliders were made by Ben at Stric9 Fabrication in Tucson, Az. The web site is down but Biju has purchased 2 sets from him and probably would be your best bet for contact info. They are well built.
As for stingers, they are not the same as brush guards. brucs guards are just that...they will push small brush out of the way. Any hard objects will simply bend or destroy it! A stinger will need to be custom fab'd. Any good local fab shop should be able to build what you need. My bumper when built will have a small stinger incorperated into the design. The stinger will help when coming up to tall rock objects. It will give the front end some protection and allow you to push up/over it.