That bull is definitely not 50", but would need a better angle to see if it has 3 brows, but probably not. I've toted a scapula around and found that if in prolonged wet weather they tend to get slimy and soften, and eventually start to crack and fall apart when raking on trees and brush. I prefer a smaller sized wooden canoe paddle if I'm not hiking long distances. I also have the fiberglass moose magnet caller and it works well for projecting calling sounds, but I don't do much raking with it for fear of breaking it apart. It's also cumbersome to pack, but I made a paracord lanyard to have a way to attach it somewhere. I called a bull in with a Powerade bottle with the bottom cut out. You can also shove the bottle on the end of a stick and use it for raking. I recommend the Mtn Blast flavor for best results.
The custom of a friend of mine is that when he first arrives in camp he makes a large funnel from birch bark and uses that for calling for the duration of his hunt.
Plastic jugs, action packer lids, even just beating the brush with a large stick will work. Necessity is the mother of invention.