Ric,
I have seen more abrasive nylon (probably Scotch-Brite) pads in the paint section of hardware stores, but I don't know what their grit level is. They are very heavy duty and maybe as low as 150 or 100 grit. I have bought them but I only use them on rust or really heavy, really old paint.
I understand about your not wanting to dull the particles, but I still wouldn't use anything as low as 220 grit on anything unless I were doing a total re-surface on a ball that's been tracked out. Up to that point, the Burgundy, which is 320-400 grit, should suffice.
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"We get old too fast, and too late, smart."