Sudden crack in C41 Perspex deck window

[Tarrant]

Looking for help. Yesterday discovered vertical crack in port side deck window on lightly sailed C41 9 years old. No obvious idea as to reason. Bavaria agent says need to change to glass now as Perspex faded out by Bavaria. That means changing 4 windows!! They have estimated at about £900 plus vat each plus fitting !!!! Talking £7000 plus!!! Do Bavaria have replacement Perspex windows or a template to cut too?

[Yngmar]

Checked SVB? They're an official Bavaria parts dealer.

DIY it'll cost less than 10% of that quote, even if you buy a router to flush cut from the old and an oscillating tool to scrape out the old gunk. Or send it off to have a company remake them and just install them yourself.