I'm looking for sheet protectors, and having a hard time finding what I need:
+ Needs to be A4 (I'm using them for European-formatted documents)
+ Open on two sides (left and bottom, for example)
+ No holes for folders, etc.
+ Clear or semi-clear
+ I think they made be made by Leitz or Avery, but not sure 
Any idea where I can order something like that for delivery in the US?

Hello Mrfrog,

Adorama carries the product with the exact specifications you?re looking for.

They are size A4, open on 2 sides, no holes, semi clear and can be
delivered in the U.S.

Polypropylene Print Protectors 
Size: A4, 8-1/4" x 11-3/4"
Sealed on Two Sides
Pack of 25	
SKU #	FSPLA425
Mfr. Part AW14611-25
Our Price:	$13.95 
Archival Polypropylene Envelopes are almost Transparent
http://www.adorama.com/FSPLA425.html


Polypropylene Print Protectors 
Size A4, 8-1/2" x 12"
Sealed on Two Sides
Pack of 25
Our Price: $12.95  
http://www.adorama.com/FSPL851225C.html


Another option could be these Project Folders
Vinyl, Non-Glare, 
14"x8-1/2", 
50/PK, 
Clear 
Super-heavyweight, vinyl project folders divide and organize all your
materials. Pebble grain finish. Sealed on two sides for easy loading
and access.
http://www.business-supply.com/office_supplies_product_CLI62139_-project-folders-vinyl-non-glare-14-x8-1-2-50-pk-clear.html



Search terms: 
Sheet OR folder protectors OR sleeves A4 ?sealed on two sides?
clear plastic A4 folders

I hope the information provided is helpful!

Best regards,
Bobbie7

That did the trick!  Thank you very much, Bobbie.  Cheers, Tor.