Bryan
These Armstong type seem to be the way too go. They came standard on my Potter Bracket. I replaced them with (2) off-white in color. I have the original white ones you see in the picture below in my garage which are in perfect shape. They are for 8" cut out. Retail $24 each. PM me if your interested and I'll make you a deal you can't refuse
Here's the web site----->
Armstrong
