The equipment required consists of a drill press...or a steady careful hand holding a drill...no need to make this complicated.
The old original BLR's had a funny, useless little metal bobbin at the front of the fore-arm, and Uncle Mike's had a specific kit that allowed you to install the front swivel there. The current guns just require two wood-screw style swivels, installed in appropriate locations front and rear. You can also use a barrel-band front swivel; I have one on mine and like it better than the drilled-front type. In any case, you don't need to locate/pay/wait for a gunsmith. Like IAFS said above: take your time and measure carefully.