I think you're right about it being two pieces sewn together. That first link is what I saw at Joann Fabrics. I'm torn between that and a silky or cottony look.
I've been on Tandy's website. They don't seem to have any white sheepskin, at least not right now. They have deerskin, but I'm worried the texture will look different. I totally forgot about Black Friday though! I bet other websites will be selling it cheap too.
As for the hood, I struggled mainly with the sizing over the past year, but I finally perfected the shape, size, and getting the inner hood to lay flat against the outer hood so I'm good to go there.
I'll post a picture of my mockup if I can find a picture of it.
Thanks for all the advice and the tutorials. I really appreciate all the help!