Your windows are made by a company called Hehr. They don't make the windows and stock them, they make the windows one off when ordered. So if you order a new window from them, they're usually several weeks out. I waited a little more then a month when I had a bathroom window damaged by road debris.
Ordering windows cannot be done direct through Hehr, but can through Entegra. I ordered one through Pelland and was successful at a lower price (www.pellandent.com
If you order a new window, they are VERY easy to replace if you are handy at all, strong enough to left the window into place and can get help from a handy friend with a ladder. All you do is unscrew all of the phillips screws on the inside around the frame of the window. The inner frame will come out on the interior of the coach, and then the outer will come out from the exterior. Obviously care should be taken not to drop the window out. To install do the reverse after replacing the foam gasket that goes around the window on the exterior paint surface. The gasket will have to be ordered separately as they don't come with the window.
I have successfully glued the windows back together by cleaning off the existing double sided tape and glue using acetone. Then use a urethane product such as 3M 08693 and give it 24 hours to cure. You're likely to never get it apart.
Edit: Sometime in 2017 Hehr improved their manufacturing process and has had very few window failures since. Prior to that, your experience was common. I replaced six window in the 2 years and 60,000 miles I had my 2014 Anthem.