Welcome Jan... Unfortunately you are not telling us anything that we didn't already know when it comes to glass replacement. With Taylor-Made your only hope is finding that part number which is usually in the form of a sticker located on the inside bottom of the window frame or actually within the window glass track itself. Given the model year of your boat (1999) there is at least a chance that Taylor-Made will have the glass molds once you provide them with their model tag.
As Larry noted if you do a site search here for 'glass' you will find numerous threads discussing the problems members have had in finding glass. Its not impossible though, there are usually 2 or 3 ads on eBay with Mariah glass for sale although they are $$. There are a couple of shops that can make glass (
Ocean Dynamics and
Marine Glass Specialties come to mind) but you will need deep pockets to afford their prices. And, they will likely require your window frame to be used as a mold.
Also, try to keep an eye on our own
Marketplace because you may find someone parting out their boat that has glass that will fit.
The only other option i can think of is making your own out of Lexan or acrylic. One of our members did this and you can follow what was involved
here.. Your option with this is finding a plastics company in your area that works with either acrylic or lexan (acrylic is a bit better because of the UV protection) and seeing if they can mold a piece to fit your windshield frame.
Broken glass in Z-250, needs replacement
