lumber yard? Maybe camping supply store? Or just order them online at Amazon.com the one in the pic looks just like the arm surplus one I bought when I was 10 years old. I cracked the handle so made new scales for it with a layer of white nylon 1/16" thick followed by brown micarta and used solid aluminum rod to rivet it together in shop class at school. That was 45 years ago and it still hacks stuff quite well. Just need to sharpen from time to time. Though I've never tried it on a computer. Have to put that on my bucket list.