We first replaced the rubber windshield seal with a fibreglass fairing in Africa - and it made such a difference we put in a mod with the LAA on our first UK build.... This has become popular, and we have put together a kit for those who are looking for the same as we did...
two grades of cloth
Resin and hardener
1 mixing pot with stirring sticks and application brushes
As with all such parts YOU are responsible to assess the air-worthiness of this part before EVERY flight. We have used this method on fairings used for many hundreds of hours with great success.