SoG has them in stock (or at least they usually do) they sell them for about $170 for the adjustables I think.
The rear I suggest the Perrin bar. It comes with heavy duty mounts for about the same price as other adjustable bars.
Ive got the 27-29 front bar, and the 22-24-26 rear bar. They're "good stuff"! See my review in our reviews section
If you are running the WRX, you only need one of the bars really to control your roll. I went with the rear because it was the smaller of the two bars. I went with the Whiteline 24-26mm adjustable. I run 26mm all the time with stock endlinks and love it. It definitely helps with car rotation when trail breaking. I never experience any snap oversteer, especially since I have stock endlinks. I can't speak for snap oversteer with solid metal endlinks. The sway bar mounts I didn't think were necessary unless you go above the 26mm or decide to stiffen all of the rear suspension components. Thats just my opinion though. Stay away from the bars that are just 22mm. Its a minor difference over stock for close to the same price as a 24-26mm.