Here is the story on the front and rear gl.

Front:  We use a new stock type windshield and modify the windshield channel and cowl area to flush mount the gl.

Rear:  The rear window gl is totally custom and available only through us.  There was a problem with the mold, so are having another one made.  The window gl should be back in production and available for shipment in late January.  We are currently accepting orders.  Production will be very limited, so first come first serve.

I love that you flushed out the front and back gl. I've been wanting to do that to a '78 Z28, and am glad to know that the front gl doesn't need to be custom made. I've researched having a custom auto gl shop make the rear gl, but if you already have it, hopefully I'll be able to get that from you. I was wondering if there were any modifications to the side gl?