I have a full roll (at least it appears to be a full roll) of negative sleeves. This is the type the 1 hour places used; about 6.75" long and perforated between strips. Not sure of what material they are. The roll weighs about 8 lbs. Shipping at actual cost from 55441. Or pick up if in the Minneapolis area.
If you don't want the full roll, I can probably get 300-400 in a priority mail envelope.
PM me if interested.