Seeing as how I'm bone-idle, I couldn't be bothered fighting off zombies... I'd just let them eat me brains and make me into one of them. And zombies don't shave, do they.. probably end up cutting their noses off or something (especially if they used one of them R41 things)
One off ebay ... there has to be so much mixed DNA on those things that I would lob it at them and let them pull all the old skin and hair off it while I made good my escape.