This thread has inspired me to commission a porcupine stopping rifle. Not just a rifle that will "work" mind you, but one which will turn a charge. Of course it will be chambered in the classic porky stomper, the 7mm Remington Magnum.
Stainless synthetic or classic wood, what say you?
Either will work. Just hang a Ruby Eye Wiggler off the front sling swivel to keep their attention, and you will be fine.
Important that the hook be barbless and not too sharp.