Convertable top help please
 

The bottom part of my back window is starting to come off and i need a new top ayways. A buddy of mine told me that i could order a new top and get an ulpulstry shop to sew it in or something i am not really sure about that so i need suggestions from someone who has done this before??? or anyone who knows about replacing the top. I know you can but new tops for around 200 and the ones with windows cost like 500 but i already have a glass window just need to figure out how to get it put in the new top that i am am gonna order?? help please??

no one has any advice??????