Wow Rob, you are a very creative person on a great budget.
Mine is an Audio-Technica (AT618) Disc Stabilizer (made in Japan) and using both rubber (hockey puck style) and hard shiny metal (and quite heavy) materials.
Thirty dollars ($30), but I bet I could have made my own for less than five bucks.
Youpi for all of us, DIYers! :woot: