The MS-1 cups are the same size as the SR-60 thru -225 cups -- and the same diameter as the newer SR-60i thru 225i cups. So you can widen your search -- unless it is the "Alessandro Music Products" wording you are looking for.
I would like to stick with MS-1 cups. It would probably raise some eyebrows if I tried to sell them in the future with different cups. I may broaden the search if nobody comes forward with the MS-1 cups.