Love the Lance 2375 layout: but the price! Any alternatives?

Haven't heard from Lance yet about the material of the window, but I saw another thread on here where a rock shattered it. They said it was dual pane glass and only the o/s pane broke, so they were able to keep going on their trip. They said the cost was around $1000 and was easy to replace. They were wondering if some sort of protection could be had for the window, but didn't come to any solution.

Also various others ones on the internet saying they've had these window break - not a good thing!