When you least expect it, you will find it. Glad you could make another block to replace the "lost" one. Gorgeous quilt.
My funny lost story: I wear very expensive Rx glasses (bifocals with dual prisms). I cannot see without them and cannot drive without my glasses. I have both clear lenses and sunglass lenses. One day I just couldn't find my sunglasses. I knew I had them when I drove home from the grocery store, because I was wearing them. Long story short, about 2 weeks later, I went to take something out of my deep freeze and lo and behold, my sunglasses were in with the frozen veggies! Now, whenever I can't find something, I always check my fridge and deep freeze.