It took me a couple of days to run these guys down:
http://www.ssdunlimited.com/# They are the maker of the wreckover booms. There are a couple of pictures of them in their Gallery, but the picture on their Products page don't show this version.
I bought one of this type from them, but without the linear actuator; as I was making my own screw drive for it. I also didn't buy their winch, as I found a KWS converted servo-winch had a lot more power on an rc crawler forum:
http://www.rccrawler.com/forum/elect...2-k3-k3x2.html I bought his double-servo version, (he has a video link posted that shows it lifting a floor jack), which should be more than enough power to for any of our trucks. I found that the stock 12 inch frame length was too short for my build. So, I sold it to a friend, and had them make me another one with an 18 inch frame. I also had them change the angle & height of the brace for the stinger a little, and am very happy with it.
Call and talk to them about what you want - they were both friendly and willing to tweak their design a little to meet your specs. -Mike