This can happen, at least to a lesser degree, with even the stock windshield. Mine overheated my instrument pod once and caused the right side screen to go black. The damage wasn't permanent, but it does show how hot it gets when you park where the sun is at just the right angle to the windshield. It only ever happened once, so it definitely has to be one of those perfect storm of right conditions.
Rocky Mountain ATV in the US lists that part on their website. You didn't say what year your bike is, but I suspect that part is the same as the one on my 2014. The part number for a 2014 non ES is 2BS-8353E-01-00, which replaces the older part number 2BS-8353E-00-00. Rocky Mountain lists the part for $191.87.
Rocky Mountain is a great company to do business with. It's my first stop for OEM parts.
Get OEM parts at Rocky Mountain ATV/MC! We carry major powersport brands like Honda, KTM, Kawasaki, Yamaha, Polaris, Can-Am and more!
www.rockymountainatvmc.com
You can check your model year on Rocky Mountain's site and see if it has the same part number.
Revzilla has the same part, for a slightly higher price. Their website says it's available, but ships in 1-2 weeks, which is about the same as Rocky Mlountain.