Not to sidetrack the thread but, are you inplying there may be a change in WA law in regards to sbr, and sbs's or did I missread what you said. if so fingers are crossed big time.
I built my own 3 point sling using components I bought from here http://www.strapworks.com/ just watched a few youtube vids on slings I liked and coppied with my own components. made it to fit my how shall I say oversized torso.