Bagsunlimited has all sorts of sleeves. I use archival polyethylene or something like that. Use it for inner sleeves and for album jacket sleeves.
Work great.
Just count any you get. They shorted me once, and did send the difference at their expense.
Anyone who does any cd, dvd, lp, books, comics, etc, should check out and get the Bagsunlimited catalog!!!!!!!