yes , here is the fiberglass one
I first made a carboard tube, taped it good and solid with some duct tape and wrapped it with a couple layers of saran wrap so the epoxy didn't stick to the carboard.
When I cut the fiberglass I cut tapered strips length wise and 1.5" strips to wrap around in a kind of rib fashion.. Each piece was wetted out before applying it to the cone.
At the end I gently wrapped it in saranwrap and rubbed the bubbles out as best I could. The plastic wrap will leave a smoother finish that needs less finishing after.
At the mouth end you want to make sure you roll the saran wrap over the edge and inside the tube to leave that nice smooth mouth area of the call.
Same at the wide end, just roll the saran wrap over the edge and push the air out as you go and it should give a nice rounded edge that won't need much detailing at the end.
Some trimming here and there with a dremel and drum sanding bit.
For the Lanyard I used a piece of plastic tube I glassed into the side of the call while I was making the tube.
This call serves 3 purposes..... as a mouth call, nice volume for filling with water to imitate a moose urinating and it makes a very authentic antler sound when scraping willows and trees.
The lanyard helps me not lose it....... I have had to go back and look for that birch call on a few hunts LOL
Crush proof, cold proof, waterproof...... I coulda bought a plastic one I guess.... but I like this one, it really projects and makes sweet sounding calls and scrapes