I got the window on this morning. I used very thin acrylic because it was the cheapest thing at Home Depot in the right size. I may switch it out in the future because there were a few cracks and I assume they'll get worse in the weather.
I also finished most of the left side of the coroplast skin. I'm having a little problem with the gap between the body and the hatch, so I'll have to come up with something for that.
everything would have been so much simpler if I didn't go for functionality of the hatch...