I've not done it (making an A-arm) because then I could get much problems with the yearly tests here in Holland (APK). We may not weld on "wielgeleidingselementen", and that's also the front control arms.
But at this moment i'm verry bussy with reinforcing the original trailing/control arms. For pics (of the arms at 50% finished) see this link.
Reinforcing control arms
GReetings Wiebrand