Targa Convertible Conversion

I remember about ten years ago looking at an Excellence Mag. a company that sells convertible top conversion for the 911's Targa. The name was California Convertible Company then La Machine (new owners).
Their not around now, doest anyone know of a company that sells the conversion? are they still around? or does anyone know where I can pick-up a 1983 convertible top assembly complete? Thanks for any and all of your help.