Cal 34 Cabin Window Upgrades

[SS Little-Devil]

Out of curiosity, I looked at a Cal 34 the other day. It's supposed to be a pretty bullet proof boat for the size. It certainly seemed well built, but I noticed the cabin windows on the sides seemed very weak with lots of flex.

I looked at Zach Sunderland's old Islander 36 last month, which is for sale in Marina Del Rey. It had the windows removed and thick plexiglass put in their place. It was a pretty rough job with lots of silicone, but obviously they were more concerned about utility over how nice the finishing was. Thinking back now though, I realize this must be a point of weakness on many boats including the Cal above. Can anyone recommend options to beef up the strength while still keeping the boat looking good? Do they sell new windows to fit and if so, where can you find them?