I am currently building my own Crow and found a lamp that has the exact brackets and square tubing you need for the arms. It's a Bostitch VLF100D Swing Arm Desk Lamp. You need to cut the square tubing down and it doesn't have the wrist brackets. Those I made myself from sheets of plastic. Seriously, I bought a repo set of arms specifically for Crow and the parts from these lamps were much better.