I am looking for some RPS Plastine 35mm negative preservers - the ones that hold 6 negative strips and were imported from Japan by Dot Line Corp. a few years ago. These are sleeves that are sealed on two sides and one end, with a thumb cut out on the other (open) end. Does anyone have a source for these? I could sure use 6 or 7 packs of (100) sleeves. Thanks for the help! A.T.