[nautiquelfe]

You should try mcmaster carr as a source for the plastic as im sure they have what you'll need. They are a huge source for most anything and everything. I have catalogue's but I'm sure they have a website to search. I'm not sure what the gauge thickness is for the material but I do know when you replace the plastic alone the shop has to remove a small amount of the fabric. I believe they cut off enough to remove the old seems. That requires the new window to be slightly larger in size. Buy a piece of square stock and have the upholstery shop cut it to size using the old one as a pattern. By the way what will they be charging for the labor for removing and replacing the top?