Time To Repair or Replace The Top
 

2000 S. I want to replace my rear plastic window with either a tinted plastic window or a glass window. What are the right ways and what are the cheapest ways to do so ? What cost can the entire top be replaced for ? Details please.

You may want to consider these folks for a replacement top,

GAHH: Convertible Tops, Auto Interiors, Quality Convertible Tops

https://sites.google.com/site/mikefocke2/thetop-itsmaintaince%26replacement

Check this web site for a good discussion of Boxster top repair and replacement options.

I think it would be inexpensive to remove the top assembly and take it to a boat/upholstery shop and ask them to sew in a new one. It is surprising easy to take off the top. I took off the top with the help of another forum member.

Oh man! Someone cut the plastic on my top ! - 986 Boxster Top Issues and Solutions - RennTech.org Forums

I wouldn't try to sew it in from inside, unless you are a masochist.