1999 Camaro Convertible Top
 

Newbie here, just wanted to know if anyone on here would know or could recommend a quality company that makes a good quality top. I need the inner top back top with the glass defroster type(Haartz GM top) thanks.

hay cicero welcome to the forum. I'm thinking gorn, green arrow, maybe even liberty, help this fello maro owner out. hope one of them will come around to help you. enjoy.

Topsonline.com is the most popular place for oem style fbody tops

Also try
Replacement Convertible Top Manufacturer, convertible tops, rag tops

and
1994-02 Chevrolet Camaro, Factory Style, Two Piece Convertible Tops Convertible Tops and Convertible Top Parts

Supposedly ASC made the original 4th Gen tops:
American Sunroof Corporation

Here's a how-to:
How To: Convertible top replacement (Long!) - Camaro Forums - Chevy Camaro Enthusiast Forum