I haven't seen any of those in a while. They have kind of gone out of style, they're not really good for your paint. They do look cool, though! Maybe Y-1 has them? I don't do much biz' with them.
Hi Johnny: Those might have been available long ago through the GS Club of America. I discovered, today, you have a new Buick in the stable - a 1967 GS 400 convertible. Nice! Nando.