Clear distributor cap

Does anybody make a clear distributor cap for a slant six? Hays used to make one back in the 70s. It was very high quality with brass contacts. Great for a quick check for fire.
Thanks, James
You just took me back in time, I haven't saw one of those in years, I remember the first time I saw one, a friend of mine had it on his 67 GTO in around 1978. They were common until the late 80's and I haven't saw one since.