These guys (
http://www.dutchmanaxles.com/ ) can do your axles in standard 4140 or in hardened, high alloy material. I'm not sure about the control arms, but you can ask and see what they have available. I've had 2 sets of axles done by them and they were great to work with and their work is first rate. I'm thinking of changing my rear to the Kirkham aluminum differential and building Porsche 930 Cv's for it as they can supply the CV parts, but have to let momma cool down from the final cash outlay to finish my car last fall.....
Bob