Help with how I can make this fly

Got this fly yesterday from someone I was fishing next to, the moment I tied it on I finally started catching them, I eventually lost it on a fish and went to a couple stores in my area looking for it(no luck) I bought some hooks and a bunch of different stuff to try remaking it, oven-dry clay, mounting putty, and air dry clay, oven dry clay and mounting putty sink and the air dry clay dissolves in water, if anyone knows a putty that hardens but also floats in water that’d be so helpful, thank you