I am trying to source some 4-40 machine screws that are greater than 1" long. They can be 1-1/4 or 1-1/2 doesn't matter. Home Depot and Rona only carry them in length up to 1". I am building a robot chassis and the thickness of the motors and the acrylic combined is 1" leaving me no room to thread a nut on the end. Any ideas?