Skeeter Vaughn used modified Garand bayonets.
"Though it was dark, the Americans realized they would be clearly silhouetted against the snow-covered ground if they approached. One of his men asked Skeeter if he could kill the German from a distance with the 16-inch throwing knife he had modified from a bayonet. Skeeter decided to risk a try, crawling as close as he dared to the sentry, whose back was toward him."
Perfect balance thrower Bowie is great. Unfortunately you missed the Cold Steel sale a year or so ago.
http://www.coldsteel.com/perfect-balance-thrower.html
AG Russel sold original design back in the 70s with leather scale handle. I wish I knew where mine went to.
Buy one and copy it and make a bunch with old leaf spring. You'll need a side grinder with cut-off wheels and grinding wheels and old leaf springs, some bricks, lump charcoal, piece of pipe and a heat gun. Look up how to make a dagger on youtube.
Amazon has them for about 17 bucks I see.