So I called 3M directly and they cross-referenced their product codes. Apparently light grey 7448 is the industrial product number, light grey 10144 is the exact same product branded for consumers; both replace 00 steel wool. Likewise, white 7445 is the industrial product number for 10199 for consumers and both replace 0000 steel wool. I found both consumer versions commonly available at Lowes for $6 each whereas the industrial versions were much harder to find locally and were more expensive (and there are a ton of hardware, auto parts and industrial supply shops locally too).