I'm searching Rite Aid Pharmacy stores in my area.
nick n and micmacmo sent me some Absorbent Cotton from London Drugs. It comes in a 1 lb. package. It's in a sheet approximately 25 mm thick and its similar to Rite Aid Natural Absorbent Cotton. In terms of its "fluffy factor" it's not as fluffy as Rite Aid Natural Absorbent Cotton but much more so than the current Rite Aid replacement labeled "First Aid Rolled Cotton" that has not worked for me.
I have not yet tried the London Drugs cotton but it's on my "to do" list.
Cotton balls, once pulled apart, may work.
Thanks for the info. I will try to make even layers of cotton balls, since I can have a huge bag for 2$.