Yes Joey, those are the ones. Thanks everyone. I am very familiar with Raybestos as a brake company (having worked in the wholesale auto parts industry for several years), but never heard of them making making rubber products. I know their brake parts used to contain asbestos, as did most others because asbestos has such high heat resistant properties. I also know that damn near everything in the 50's-60's contained asbestos, including rubber products (wire insulation for example). I wasn't sure if this was the case with these cushions as well, for all I know they could be impregnated with asbestos and that's what makes them perform so well. Even if they did, being installed on a table under cloth, I don't think there would be any asbestos dust to worry about.
On a side note, does anyone know how these Acme tables played?