okay, i got these from roberto, who always used to be at the record fairs with the italo stand. he also has an ebay shop:
http://stores.ebay.nl/COLISEUM-RECORDS. you can also contact him from there. he told me he gets them from a dealer in rome.. so maybe there are other places where you can get these. i'd love to know.. only time i ever saw them was at record fairs, but then they have a plastic glue strip on the back and are used to seal records tight in against dust, i suppose..
evidence:
here's the record in the sleeve:
here's the sleeve itself. actually the new ones i'm getting are a bit tighter still, apparently they don't fit over thick album covers. these ones are a little bigger than the sleeve, but they stay on perfectly and don't come apart from the record cover when you take it out or put it back into wherever you store them:
this is what i truly love about them: i can read the back of the covers again!
as opposed to this, which were my normal covers. they are thicker, and have the seal part on the back, which makes it one unrecognizable mess when you records are in any kind of dj furniture like the well known ikea thing i have..