Ive stalled for the moment as I am having trouble finding leather.
Yes the leather is a tricky one. I scoured high and low to find this (see the inset picture):
It is a 2mm thick calf leather, that in my opinion most closely resembles the base colour of the actual leather. Here are a couple of things I concluded when looking at the original:
1. The snout is a thinner one compared to the back covering piece and the strap. The snout also has a smoother texture compared to the back piece. The back is definitely cowhide, as can be seen by the texture, but for the life of me, I couldn't find cowhide that is exactly the same colour as the snout leather that I found. As such, I will be folding 2 pieces together to simulate the thickness.
2. The original piece reveals a lighter tan colour when scratched. When I tried to scratch mine, the colour doesn't get much lighter. I guess when I come to it, I will scratch the leather, rub in a tan colour, and blend it in. Hopefully I can get it as realistic as possible. I really like the base colour of the leather that I found, so I will weather it from this starting point. I am foreseeing several tones of greys, browns, tans and oranges.
I do have a pretty big piece of leather, and if you are keen, we can work something out.