Don't overlook the free foam which is often used to cushion electronic devices, cameras, computers etc. In fact this was the original material Jack Gartside used to tie his Gurgler. He was notorious for using run of the mill recycled items in his fly constructions and his invention of the Gurgler was no exception.
He wanted two things in the Gurgler when he designed it the first was that it should make the characteristic gurgling sound for which he named it, and the second was that it be as aerodynamic as possible. He achieved both with what many of us would simply have thrown away.
The fly was originally tied for Stripped Bass, but has proven itself as a surface lure for almost any species which will attack top water flies.
Tight lines,
George