sorry, no pics of them at the moment but I built my own to connect the new rear frame rails. I dont know if the way that I did it will work for you but I cut the frame rail extensions off the car (as well as the floor pans but you shouldnt have to go that far). I then cut the bottoms off of the front frame rail and slipped a 2*3*14ga tube inside the front frame rails and have started the install. They are 6 feet long and run straight back to my rear frame rails which are only slightly similar to the originals in some of the bends. My rear frame rails are moved inward so the connectors can run from the front frame rail to the rear in a relatively straight line (only a half inch difference from front to back over a 6 foot length). Currently they are half welded on the back but will be welded over a 1.5 foot overlap.
If you are going to do a stock install, why not just buy connectors? Aren't they only around 100 bucks? You might save 25 bucks but its not worth the hassle of running around collecting the steel unless you are not doing a stock application.