I’ve made quite a few, too. Links are on my blog. Today I needed a 45° offset 7/16-inch open-end wrench. I just couldn’t bring myself to buy one for $8 to cut and bend it. Since I have tons of woodworking flat paddle bits from my father-in-law, it was the perfect stock. I found a 7/8-inch paddle bit with a broken tip. Perfect. A few minutes with an angle grinder and the problem was solved.
If you don’t have scrap tools, pawn shops typically have scrap bins full of wrenches and sockets very cheap. Cut, grind, heat and bend. Be creative.