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They were the tubeless version, and I had some Marathons before those that were the tube type that I tried to set up tubeless but they just wouldn't seal unfortunately. You might get away with one of those Stan's kits with the rubber rim strips though.
Or - make your life easy and get some Continental tubes that are the same size as the cavity of your tyre so they don't stretch much, and put sealant in those. I did this when I had a road bike, and I had a few punctures and all of them sealed, the tubes must have been ancient when I sold it.
Just wonder, those supremes, were they regular tires set up tubeless or some schwalbe tle/tlr version? i have them on one of my bikes (regular, not tle) and was thinking it they can work with milk..